LS1 swap issue.

***J_SIN*** · 07-03-2009, 04:52 PM

this might get long winded so here's fair warning. My friend is having an issue that cant seem to be figured out and he's very busy with other stuff right now and frustrated with the whole situation, so I'm trying to help him get it resolved so he can enjoy his truck this summer.

2000 S10, had 2.2 automatic, swapped in 1999 Camaro LS1 automatic.

Using CP harness and ECM tune.

Speedo doesn't work and gear indicator doesn't work.

Last weekend he met someone from a local shop at a car show and asked the guy about his problems. The guy said that the LS1 ECM probably wont work with all the truck components because they just aren't compatible with certain things. Last night I talked with my friends husband that is a GM World Class Technician and he said he's seen people that use BOTH ECM's for conversions like this. They run the engine stand alone on the LS1 ECM and the rest of the truck is separate from the engine running off the trucks ECM. the only things that are kind of linked is the oil pressure and coolant temp sensors. He wasnt sure what year the S10 started to use a guage cluster that is basically its own computer, does anyone know when that was changed? I haven't been real involved in this forum, but dont recall hearing of anyone on here doing their swap like this, but I assume thats because the CP harness should eliminate the need for this. I guess the frustration part is the fact that nobody else seems to have had this kind of problem. Has anyone heard of this and been able to get it resolved?

BTW, the truck runs fine as it is. He had to unhook the o2 sensors but he thinks those just need to be replaced and that should be resolved. the gear indicator isnt a huge deal but he cant be driving around all the time with no spedo.

Petro · 07-03-2009, 05:00 PM

Other guys have had problems with the guages...but CP wire should be able to help and will most likely fix the problem since he built the harness...Very good customer service....And I've seen guys use the S10 computer to control the everything but the engine...The LSx computer just controls the engine and trans....SpeciesX had the same problem with his gear indicator not working and Jared fixed it right away...Not sure on the speedo deal though...

***J_SIN*** · 07-03-2009, 05:06 PM

he has gone back and forth with CP for a while trying to get it resolved but it hasnt been fixed yet.

***philntx*** · 07-03-2009, 06:30 PM

I have a 2000 Blazer. I'm using a single PCM. Everything works fine.

Jared's base program allows the gauges, ABS, cruise control and the electric fans to work properly.

If your friend had to unplug the O2 sensors, there is something else wrong. They may have been connected to the wrong side.

The speedometer is very easy. Assuming that the speed sensor is connected to the harness and the PCM is properly programmed it will work. Mine reads the exact speed. I timed it between 10 one mile markers and my odometer read 10 miles exactly.

Did your friend try to have the PCM programmed locally?

Has your friend called him and spoken to him or is the communication being completed via the internet?

(Edit: The IP does receive input from the PCM)

(PS, I don't know anyone who is using two PCM's for any LSx based swap)

The "tech" he spoke with isn't familiar enough with LSx-based conversions to be drawing conclusions about compatibility. He may be good at his job, but unless he has completed a fair share of these type conversions, it's not the same)

Phil

**Kampz69** · 07-03-2009, 06:34 PM

Quote: Originally Posted by philntx

(PS, I don't know anyone who is using two PCM's for any LSx based swap)

thats what I have always thought. It was the LTx swaps that needed both IIRC.

***J_SIN*** · 07-03-2009, 09:02 PM

Quote: Originally Posted by philntx

I have a 2000 Blazer. I'm using a single PCM. Everything works fine.
Jared's base program allows the gauges, ABS, cruise control and the electric fans to work properly.If your friend had to unplug the O2 sensors, there is something else wrong. They may have been connected to the wrong side.

he tried swapping sides with the o2 wires but it still ran the same. I do find it weird that it runs fine with them unplugged, it just uses a lot of gas right now. he's pretty sure they need to be replaced.

Quote:

The speedometer is very easy. Assuming that the speed sensor is connected to the harness and the PCM is properly programmed it will work. Mine reads the exact speed. I timed it between 10 one mile markers and my odometer read 10 miles exactly.

so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing?

Quote:

Did your friend try to have the PCM programmed locally?

no, CP programmed it

Quote:

Has your friend called him and spoken to him or is the communication being completed via the internet?

he has talked to CP on the phone and I believe he was told to test some pins
but how does he figure out how the pins are numbered?

Quote:

The gear shift indicator has nothing to do with the swap. The instrument cluster indicator gets its signal from the BCM. The floor shifter indicator is manually connected to the shift cable.

what is the BCM? its the dash shift indicator that isnt working. I dont even know if he has a floor shifter.

Quote:

(PS, I don't know anyone who is using two PCM's for any LSx based swap)
The "tech" he spoke with isn't familiar enough with LSx-based conversions to be drawing conclusions about compatibility. He may be good at his job, but unless he has completed a fair share of these type conversions, it's not the same)
Phil

one other piece of info I got from my friend. before the speedo was plugged in, it was pegged at 120 MPH. now that its plugged in it stays at 0. does that tell you anything that may help figure out the issue?

I thought it sounded weird about the dual PCMs, thats why I brought it up. didnt think anyone was using that setup witht eh LSx swap. thanks for the help and info.

Petro · 07-03-2009, 09:19 PM

Quote: Originally Posted by J_SIN

so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing?

It probably wasn't programmed in...IMO

***CPWire*** · 07-03-2009, 10:18 PM

I just received his computer back the other day.
Last I knew, he said he would wait to see if there were any other problems so we could make sure we take care of them if any more popped up.

I intend to make some more changes and get him his computer back to exchange the one he has now.

***J_SIN*** · 07-03-2009, 10:25 PM

you got his original computer back? I thought it was ruined? either way, if he can get another PCM that for sure has the speedo programming to test, that would be great. then he can at least verify that its one problem or the other.

I believe the speedo and shift indicator are the only issues. he's been driving it a little bit and I dont think there has been any other problems.

***CPWire*** · 07-04-2009, 07:15 AM

The speedo I just can't see being a programming issue. I think that may be related to something with a wire maybe, we will see.
As for the PRNDL lights, that is most likely the program. I have run in to that before just recently.

***J_SIN*** · 07-04-2009, 12:43 PM

well with the other PCM we will be able to verify both problems. I'm not positive but I don't think he ever had the truck running in gear when he had that PCM so who knows if the speedo would have worked. At least with a second PCM to test we will know that if it doesn't work we need to start tracing wires. how soon do you think you can send out that PCM?

if it does come down to tracing wires, is there anything you can send with the PCM that will show us the numbers for the pins we need to test? I think he mentioned something about a purple/black connector? cant recall exactly what he said, he just didn't know which pins were which since they aren't labeled with numbers.

thanks for the help

***CPWire*** · 07-04-2009, 01:46 PM

I should be able to send the other computer back on Monday.
I will include a diagram showing how the speedo wires go.
It just goes from the red computer connector, to the connector that is right next to the computer.

I also have a truck I can plug the computer in to and check the PRNDL display before I send it back. It was an issue of using the F-body base program vs. a truck program. The F-body doesn't have that display in it, that's why it is important to start with a truck file. I think my tuner forgot about that.

***J_SIN*** · 07-04-2009, 02:17 PM

awesome, Hopefully the PCM will take care of the issues but if it doesnt correct them I will try to go up there next weekend and help him get it figured out. do you still have all his shipping information?

***J_SIN*** · 07-07-2009, 01:31 AM

were you able to send the PCM today?

***CPWire*** · 07-07-2009, 08:58 AM

No... been testing it in a truck I have here, and no idea why the PRNDL isn't working. We got it to come on, but it stays in D.
Going to wipe it out and start over completely today.

***CPWire*** · 07-07-2009, 10:13 AM

Actually, I just realized I am getting people mixed up...
Can you have him email me or call me so I can make sure we are talking about the same person?

***J_SIN*** · 07-07-2009, 10:13 PM

you have exchanged emails with him today so you were thinking of the right person.

were you able to get the PRNDL to work on the test truck?

***J_SIN*** · 07-13-2009, 12:21 AM

well, it kind of works, but when he's in drive the dash says he's in neutral and from there on its off by one gear.

***CPWire*** · 07-13-2009, 07:20 AM

Sounds like it is out of adjustment.

***J_SIN*** · 07-13-2009, 11:37 AM

the shifter cable can be adjusted to correct that?

**Kampz69** · 07-13-2009, 11:40 AM

yea, there is a white retaining clip on the shifter cable located right at the bracket that bolts to the transmission. you pull the white clip and adjust the cable as needed.

***J_SIN*** · 07-13-2009, 11:43 AM

thanks for the info.

also forgot to mention the speedo still doesnt work so I'll try to get up to his house and help him test out the wiring.

***CPWire*** · 07-13-2009, 11:45 AM

I meant the park/neutral switch. The cable I would leave alone, it is the switch that needs to be adjusted. The bolts that hold it on the side of the transmission can be loosened and the switch can be rotated. I'd have 1 person in the truck looking at the display, and someone else underneath adjusting the switch till the display matches up.

**Kampz69** · 07-13-2009, 12:15 PM

Quote: Originally Posted by CPWire

I meant the park/neutral switch. The cable I would leave alone, it is the switch that needs to be adjusted. The bolts that hold it on the side of the transmission can be loosened and the switch can be rotated. I'd have 1 person in the truck looking at the display, and someone else underneath adjusting the switch till the display matches up.

good to know, i never knew you could do that...i thought it was just the cable to was adjustable.

***J_SIN*** · 07-13-2009, 12:18 PM

ahh ok. well when I go up to help with the speedo we can try adjusting that too. thanks.

6literblazer4x4 · 07-20-2009, 04:59 AM

Quote: Originally Posted by J_SIN

he tried swapping sides with the o2 wires but it still ran the same. I do find it weird that it runs fine with them unplugged, it just uses a lot of gas right now. he's pretty sure they need to be replaced.
so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing?
no, CP programmed it
he has talked to CP on the phone and I believe he was told to test some pins
but how does he figure out how the pins are numbered?
what is the BCM? its the dash shift indicator that isnt working. I dont even know if he has a floor shifter.
one other piece of info I got from my friend. before the speedo was plugged in, it was pegged at 120 MPH. now that its plugged in it stays at 0. does that tell you anything that may help figure out the issue?
I thought it sounded weird about the dual PCMs, thats why I brought it up. didnt think anyone was using that setup witht eh LSx swap. thanks for the help and info.

http://www.ls1tech.com/forums/conver...swap-faqs.html
you can get the lsx pinouts here speedo is controlled through bcu make sure that you have the class 2 data contected to the bcu and your sensors

07-03-2009, 04:52 PM	#1
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	LS1 swap issue. this might get long winded so here's fair warning. My friend is having an issue that cant seem to be figured out and he's very busy with other stuff right now and frustrated with the whole situation, so I'm trying to help him get it resolved so he can enjoy his truck this summer. 2000 S10, had 2.2 automatic, swapped in 1999 Camaro LS1 automatic. Using CP harness and ECM tune. Speedo doesn't work and gear indicator doesn't work. Last weekend he met someone from a local shop at a car show and asked the guy about his problems. The guy said that the LS1 ECM probably wont work with all the truck components because they just aren't compatible with certain things. Last night I talked with my friends husband that is a GM World Class Technician and he said he's seen people that use BOTH ECM's for conversions like this. They run the engine stand alone on the LS1 ECM and the rest of the truck is separate from the engine running off the trucks ECM. the only things that are kind of linked is the oil pressure and coolant temp sensors. He wasnt sure what year the S10 started to use a guage cluster that is basically its own computer, does anyone know when that was changed? I haven't been real involved in this forum, but dont recall hearing of anyone on here doing their swap like this, but I assume thats because the CP harness should eliminate the need for this. I guess the frustration part is the fact that nobody else seems to have had this kind of problem. Has anyone heard of this and been able to get it resolved? BTW, the truck runs fine as it is. He had to unhook the o2 sensors but he thinks those just need to be replaced and that should be resolved. the gear indicator isnt a huge deal but he cant be driving around all the time with no spedo.
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07-03-2009, 05:00 PM	#2
Petro Registered User Age: 24 Join Date: Oct 2008 Posts: 2,536 Location: Savannah, GA User is: OffLine	Re: LS1 swap issue. Other guys have had problems with the guages...but CP wire should be able to help and will most likely fix the problem since he built the harness...Very good customer service....And I've seen guys use the S10 computer to control the everything but the engine...The LSx computer just controls the engine and trans....SpeciesX had the same problem with his gear indicator not working and Jared fixed it right away...Not sure on the speedo deal though...
	[Reply w/Quote]

07-03-2009, 05:06 PM	#3
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. he has gone back and forth with CP for a while trying to get it resolved but it hasnt been fixed yet.
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07-03-2009, 06:30 PM	#4
*philntx* Build them right....Mod Age: 54 Join Date: Jul 2006 Posts: 2,123 Location: Plano TX User is: OffLine	Re: LS1 swap issue. I have a 2000 Blazer. I'm using a single PCM. Everything works fine. Jared's base program allows the gauges, ABS, cruise control and the electric fans to work properly. If your friend had to unplug the O2 sensors, there is something else wrong. They may have been connected to the wrong side. The speedometer is very easy. Assuming that the speed sensor is connected to the harness and the PCM is properly programmed it will work. Mine reads the exact speed. I timed it between 10 one mile markers and my odometer read 10 miles exactly. Did your friend try to have the PCM programmed locally? Has your friend called him and spoken to him or is the communication being completed via the internet? (Edit: The IP does receive input from the PCM) (PS, I don't know anyone who is using two PCM's for any LSx based swap) The "tech" he spoke with isn't familiar enough with LSx-based conversions to be drawing conclusions about compatibility. He may be good at his job, but unless he has completed a fair share of these type conversions, it's not the same) Phil Last edited by philntx : 07-07-2009 at 06:25 PM.
	[Reply w/Quote]

07-03-2009, 06:34 PM	#5
Kampz69 Need LSx swap..... Age: 31 Join Date: Feb 2002 Posts: 2,060 Location: SW Chicago burbs User is: OffLine	Re: LS1 swap issue. Quote: Originally Posted by philntx (PS, I don't know anyone who is using two PCM's for any LSx based swap) thats what I have always thought. It was the LTx swaps that needed both IIRC.
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07-03-2009, 09:02 PM	#6
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. Quote: Originally Posted by philntx I have a 2000 Blazer. I'm using a single PCM. Everything works fine. Jared's base program allows the gauges, ABS, cruise control and the electric fans to work properly.If your friend had to unplug the O2 sensors, there is something else wrong. They may have been connected to the wrong side. he tried swapping sides with the o2 wires but it still ran the same. I do find it weird that it runs fine with them unplugged, it just uses a lot of gas right now. he's pretty sure they need to be replaced. Quote: The speedometer is very easy. Assuming that the speed sensor is connected to the harness and the PCM is properly programmed it will work. Mine reads the exact speed. I timed it between 10 one mile markers and my odometer read 10 miles exactly. so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing? Quote: Did your friend try to have the PCM programmed locally? no, CP programmed it Quote: Has your friend called him and spoken to him or is the communication being completed via the internet? he has talked to CP on the phone and I believe he was told to test some pins but how does he figure out how the pins are numbered? Quote: The gear shift indicator has nothing to do with the swap. The instrument cluster indicator gets its signal from the BCM. The floor shifter indicator is manually connected to the shift cable. what is the BCM? its the dash shift indicator that isnt working. I dont even know if he has a floor shifter. Quote: (PS, I don't know anyone who is using two PCM's for any LSx based swap) The "tech" he spoke with isn't familiar enough with LSx-based conversions to be drawing conclusions about compatibility. He may be good at his job, but unless he has completed a fair share of these type conversions, it's not the same) Phil one other piece of info I got from my friend. before the speedo was plugged in, it was pegged at 120 MPH. now that its plugged in it stays at 0. does that tell you anything that may help figure out the issue? I thought it sounded weird about the dual PCMs, thats why I brought it up. didnt think anyone was using that setup witht eh LSx swap. thanks for the help and info.
	[Reply w/Quote]

07-03-2009, 09:19 PM	#7
Petro Registered User Age: 24 Join Date: Oct 2008 Posts: 2,536 Location: Savannah, GA User is: OffLine	Re: LS1 swap issue. Quote: Originally Posted by J_SIN so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing? It probably wasn't programmed in...IMO
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07-03-2009, 10:18 PM	#8
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. I just received his computer back the other day. Last I knew, he said he would wait to see if there were any other problems so we could make sure we take care of them if any more popped up. I intend to make some more changes and get him his computer back to exchange the one he has now.
	[Reply w/Quote]

07-03-2009, 10:25 PM	#9
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. you got his original computer back? I thought it was ruined? either way, if he can get another PCM that for sure has the speedo programming to test, that would be great. then he can at least verify that its one problem or the other. I believe the speedo and shift indicator are the only issues. he's been driving it a little bit and I dont think there has been any other problems.
	[Reply w/Quote]

07-04-2009, 07:15 AM	#10
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. The speedo I just can't see being a programming issue. I think that may be related to something with a wire maybe, we will see. As for the PRNDL lights, that is most likely the program. I have run in to that before just recently.
	[Reply w/Quote]

07-04-2009, 12:43 PM	#11
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. well with the other PCM we will be able to verify both problems. I'm not positive but I don't think he ever had the truck running in gear when he had that PCM so who knows if the speedo would have worked. At least with a second PCM to test we will know that if it doesn't work we need to start tracing wires. how soon do you think you can send out that PCM? if it does come down to tracing wires, is there anything you can send with the PCM that will show us the numbers for the pins we need to test? I think he mentioned something about a purple/black connector? cant recall exactly what he said, he just didn't know which pins were which since they aren't labeled with numbers. thanks for the help
	[Reply w/Quote]

07-04-2009, 01:46 PM	#12
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. I should be able to send the other computer back on Monday. I will include a diagram showing how the speedo wires go. It just goes from the red computer connector, to the connector that is right next to the computer. I also have a truck I can plug the computer in to and check the PRNDL display before I send it back. It was an issue of using the F-body base program vs. a truck program. The F-body doesn't have that display in it, that's why it is important to start with a truck file. I think my tuner forgot about that.
	[Reply w/Quote]

07-04-2009, 02:17 PM	#13
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. awesome, Hopefully the PCM will take care of the issues but if it doesnt correct them I will try to go up there next weekend and help him get it figured out. do you still have all his shipping information?
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07-07-2009, 01:31 AM	#14
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. were you able to send the PCM today?
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07-07-2009, 08:58 AM	#15
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. No... been testing it in a truck I have here, and no idea why the PRNDL isn't working. We got it to come on, but it stays in D. Going to wipe it out and start over completely today.
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07-07-2009, 10:13 AM	#16
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. Actually, I just realized I am getting people mixed up... Can you have him email me or call me so I can make sure we are talking about the same person?
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07-07-2009, 10:13 PM	#17
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. you have exchanged emails with him today so you were thinking of the right person. were you able to get the PRNDL to work on the test truck?
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07-13-2009, 12:21 AM	#18
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. well, it kind of works, but when he's in drive the dash says he's in neutral and from there on its off by one gear.
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07-13-2009, 07:20 AM	#19
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. Sounds like it is out of adjustment.
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07-13-2009, 11:37 AM	#20
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. the shifter cable can be adjusted to correct that?
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07-13-2009, 11:40 AM	#21
Kampz69 Need LSx swap..... Age: 31 Join Date: Feb 2002 Posts: 2,060 Location: SW Chicago burbs User is: OffLine	Re: LS1 swap issue. yea, there is a white retaining clip on the shifter cable located right at the bracket that bolts to the transmission. you pull the white clip and adjust the cable as needed.
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07-13-2009, 11:43 AM	#22
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. thanks for the info. also forgot to mention the speedo still doesnt work so I'll try to get up to his house and help him test out the wiring.
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07-13-2009, 11:45 AM	#23
*CPWire* Makin Sparks Age: 31 Join Date: Jun 2002 Posts: 1,206 Location: Hudson, Florida User is: OffLine	Re: LS1 swap issue. I meant the park/neutral switch. The cable I would leave alone, it is the switch that needs to be adjusted. The bolts that hold it on the side of the transmission can be loosened and the switch can be rotated. I'd have 1 person in the truck looking at the display, and someone else underneath adjusting the switch till the display matches up.
	[Reply w/Quote]

07-13-2009, 12:15 PM	#24
Kampz69 Need LSx swap..... Age: 31 Join Date: Feb 2002 Posts: 2,060 Location: SW Chicago burbs User is: OffLine	Re: LS1 swap issue. Quote: Originally Posted by CPWire I meant the park/neutral switch. The cable I would leave alone, it is the switch that needs to be adjusted. The bolts that hold it on the side of the transmission can be loosened and the switch can be rotated. I'd have 1 person in the truck looking at the display, and someone else underneath adjusting the switch till the display matches up. good to know, i never knew you could do that...i thought it was just the cable to was adjustable.
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07-13-2009, 12:18 PM	#25
*J_SIN* Administrator Age: 31 Join Date: Nov 2001 Posts: 7,734 Location: tacoma WA User is: OffLine	Re: LS1 swap issue. ahh ok. well when I go up to help with the speedo we can try adjusting that too. thanks.
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07-20-2009, 04:59 AM	#26
6literblazer4x4 Registered User Age: 22 Join Date: Jul 2009 Posts: 1 Location: User is: OffLine	Re: LS1 swap issue. Quote: Originally Posted by J_SIN he tried swapping sides with the o2 wires but it still ran the same. I do find it weird that it runs fine with them unplugged, it just uses a lot of gas right now. he's pretty sure they need to be replaced. so with the speedo problem there is only two options? not connected(unplugged or broken wires) or a mistake on the PCM programing? no, CP programmed it he has talked to CP on the phone and I believe he was told to test some pins but how does he figure out how the pins are numbered? what is the BCM? its the dash shift indicator that isnt working. I dont even know if he has a floor shifter. one other piece of info I got from my friend. before the speedo was plugged in, it was pegged at 120 MPH. now that its plugged in it stays at 0. does that tell you anything that may help figure out the issue? I thought it sounded weird about the dual PCMs, thats why I brought it up. didnt think anyone was using that setup witht eh LSx swap. thanks for the help and info. http://www.ls1tech.com/forums/conver...swap-faqs.html you can get the lsx pinouts here speedo is controlled through bcu make sure that you have the class 2 data contected to the bcu and your sensors
	[Reply w/Quote]