Neat light on the dash - S-10 Forum
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post #1 of 16 Old 02-16-2019, 12:40 AM Thread Starter
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Neat light on the dash

My 84 S10 when I cracked the key just back of run. The ďchokeĒ light is on. Thatís really cute since this truck doesnít even have a carburetor anymore. 🤣.

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1984 xcab s-10 3.4L GM crate engine 91 S10 TBI swap w bored intake, Edelbrock headers. 2" Rough Country Lift. Custom exhaust, shift kit, e-fan.


EFI swap https://www.s10forum.com/forum/f106/...e-help-513616/

My build thread (3.4L)https://www.s10forum.com/forum/f106/...stions-427168/
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post #2 of 16 Old 02-16-2019, 06:27 PM
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Re: Neat light not the dash

You would have thought that since they didn't change the cluster in 84, they would have left the bulb out to save a couple pennies per truck. I suppose they were worried about dust getting in and were too cheap to make a plug for the hole. Or at least programmed the computer to not turn it on. On the other hand 84 computers were probably to dumb to do that.
So they just left it. Does the owners manual say to disregard it if you have a 2.8?
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post #3 of 16 Old 02-18-2019, 06:55 PM
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Re: Neat light not the dash

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Originally Posted by oldeerslayer View Post
You would have thought that since they didn't change the cluster in 84, they would have left the bulb out to save a couple pennies per truck. I suppose they were worried about dust getting in and were too cheap to make a plug for the hole. Or at least programmed the computer to not turn it on. On the other hand 84 computers were probably to dumb to do that.
So they just left it. Does the owners manual say to disregard it if you have a 2.8?

Computer in an '84?

Only if you're in Cali, and even then, probably not...

IIRC it's controlled by the ignition and a sensor on the engine, no computer interface.

The daily driver: 2005 Blazer
Tha toy: 1973 Datsun 240z 12.71 @115
Tha other Toy: 1923 T-Bucket
Another Toy: 1987 Buick Skyhawk
Typhony Old set-up: 1985 GMC Jimmy. 3.2L Turbocharged/Intercooled hybrid. 13.873 @ 99.08 Currently being reconstructed.


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post #4 of 16 Old 02-22-2019, 10:42 AM Thread Starter
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Re: Neat light not the dash

I do remember when the truck was carbureted and one time I had left the wire off that the choke light came on. I should have tossed the bulb out when I converted it.

Oddly...and I've never thought about this at all. I don't think that in 84 the California trucks had that ECM in it so why would they ever had Check Engine light sockets in the first place? I have an 83 cluster at my house for a spare, and I'm pretty sure it has a CEL light (albeit no bulb there) in it. Wonder if the 82 S-10 has the CEL in the cluster? Wonder why they would have had one when all the trucks were carbureted?? 1982, was there any GM trucks that used a computer? CA or elsewhere?

My CEL functions in my truck as I pinned the wire from the computer to the empty slot in the cluster harness. Works like factory!
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post #5 of 16 Old 02-22-2019, 10:52 AM
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Re: Neat light not the dash

Check the charging system. If I'm wrong, I'll send you a nickel.
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post #6 of 16 Old 02-22-2019, 10:58 AM Thread Starter
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Re: Neat light not the dash

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Originally Posted by Watthour View Post
Check the charging system. If I'm wrong, I'll send you a nickel.
Oh, it's not really a problem at all....I just thought it was funny that with the key cracked slightly rearward of run it illuminates still. The truck is fuel injected.

The title was supposed to be "neat light on the dash". Typing snafu.



1984 xcab s-10 3.4L GM crate engine 91 S10 TBI swap w bored intake, Edelbrock headers. 2" Rough Country Lift. Custom exhaust, shift kit, e-fan.


EFI swap https://www.s10forum.com/forum/f106/...e-help-513616/

My build thread (3.4L)https://www.s10forum.com/forum/f106/...stions-427168/
Quote:
Originally Posted by Racer_X View Post
I had to cut my nut in half .
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post #7 of 16 Old 02-22-2019, 01:33 PM
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Re: Neat light not the dash

Many of the early '80s GM carbed (E2SE/E4ME) applications had the "Choke" light wired in such a way that a failure at the "B" terminal (brown wire) in the charging system would illuminate the lamp, with nothing whatsoever being wrong with the electric choke heater.
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post #8 of 16 Old 02-22-2019, 02:50 PM
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Re: Neat light not the dash

[QUOTE=jimmykicker;12175563

The title was supposed to be "neat light on the dash". Typing snafu.[/QUOTE]

Fixed the title...

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post #9 of 16 Old 02-26-2019, 05:10 PM Thread Starter
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Thanks man! Hey, let me know if y’all ever need help on admin. I’d be happy to help. Don’t know how y’all do that, but it’s an offer. 🙂.



1984 xcab s-10 3.4L GM crate engine 91 S10 TBI swap w bored intake, Edelbrock headers. 2" Rough Country Lift. Custom exhaust, shift kit, e-fan.


EFI swap https://www.s10forum.com/forum/f106/...e-help-513616/

My build thread (3.4L)https://www.s10forum.com/forum/f106/...stions-427168/
Quote:
Originally Posted by Racer_X View Post
I had to cut my nut in half .
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post #10 of 16 Old 02-27-2019, 12:52 AM
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Re: Neat light not the dash

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Originally Posted by The_Raven View Post
Computer in an '84?

Only if you're in Cali, and even then, probably not...

IIRC it's controlled by the ignition and a sensor on the engine, no computer interface.
ACDELCO 88999114 {#01226455, 1226455} GM Original Equipment
Engine Control Module (ECM Computer) 1984 S10 pickup
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post #11 of 16 Old 02-28-2019, 10:29 AM Thread Starter
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Re: Neat light on the dash

I had a 1985 Chevette back in the day. It had a "electronic feeback" carburetor I think it was called. The car starting running poorly one day and I disconnected the harness. The car ran normally after that, so I never reconnected it. Seems it wasn't really necessary. I'll be ****** if I know what it even did.
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post #12 of 16 Old 02-28-2019, 07:05 PM
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Re: Neat light on the dash

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Originally Posted by jimmykicker View Post
I had a 1985 Chevette back in the day. It had a "electronic feeback" carburetor I think it was called. The car starting running poorly one day and I disconnected the harness. The car ran normally after that, so I never reconnected it. Seems it wasn't really necessary. I'll be ****** if I know what it even did.
It controlled the mixture solenoid, mostly. It really was unnecessary...

The daily driver: 2005 Blazer
Tha toy: 1973 Datsun 240z 12.71 @115
Tha other Toy: 1923 T-Bucket
Another Toy: 1987 Buick Skyhawk
Typhony Old set-up: 1985 GMC Jimmy. 3.2L Turbocharged/Intercooled hybrid. 13.873 @ 99.08 Currently being reconstructed.


"If you're not living on the edge, You're taking up too much space."
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post #13 of 16 Old 02-28-2019, 07:07 PM
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Re: Neat light not the dash

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Originally Posted by oldeerslayer View Post
ACDELCO 88999114 {#01226455, 1226455} GM Original Equipment
Engine Control Module (ECM Computer) 1984 S10 pickup
Yes, I'm aware this exists, which I alluded to, but seems VERY uncommon, even in California, where this would have been much more common.

The daily driver: 2005 Blazer
Tha toy: 1973 Datsun 240z 12.71 @115
Tha other Toy: 1923 T-Bucket
Another Toy: 1987 Buick Skyhawk
Typhony Old set-up: 1985 GMC Jimmy. 3.2L Turbocharged/Intercooled hybrid. 13.873 @ 99.08 Currently being reconstructed.


"If you're not living on the edge, You're taking up too much space."
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post #14 of 16 Old 03-01-2019, 09:30 PM
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Re: Neat light on the dash

Hi there!

My '82 has a Check Engine light in the dash, as well as the Choke light. When I swapped to TBI in 1995 I removed the choke and EFE heater relay and wiring. I don't remember the light coming on after that.

I did (eventually) solder a wire to the cluster to the Check Engine light. I used a Painless harness for a V8 TBI that came with a light on the ALDL connector, but eventually I moved it to the dash light.

Jay Vessels
1982 Chevrolet S-10 Sport
2006 Pontiac Solstice
2017 Subaru WRX
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post #15 of 16 Old 03-03-2019, 02:07 AM Thread Starter
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Quote:
Originally Posted by jwvess-- View Post
Hi there!

My '82 has a Check Engine light in the dash, as well as the Choke light. When I swapped to TBI in 1995 I removed the choke and EFE heater relay and wiring. I don't remember the light coming on after that.

I did (eventually) solder a wire to the cluster to the Check Engine light. I used a Painless harness for a V8 TBI that came with a light on the ALDL connector, but eventually I moved it to the dash light.
Pretty much the same but I used a factory harness. All I did was grab a pin out of an old harness and soldered it to the ECM wire for it. Boom.

I threw the EFE heater away years and years ago. I don’t think the relay is there anymore. But it only comes on with it cracked back of run where it stalls. I think it’s kinda funny.

That was a fun swap to EFI. Learned a lot of how it worked. The truck is so much better all around. I’ve got to learn how to tune it since the truck has a 3.4 with 2.8 bored out TBI with 4.3 injectors and headers. Don’t think there’s a “tune” for that out there! 🤣 it gets about 15mpg. I know it could do a lot better. Too rich.



1984 xcab s-10 3.4L GM crate engine 91 S10 TBI swap w bored intake, Edelbrock headers. 2" Rough Country Lift. Custom exhaust, shift kit, e-fan.


EFI swap https://www.s10forum.com/forum/f106/...e-help-513616/

My build thread (3.4L)https://www.s10forum.com/forum/f106/...stions-427168/
Quote:
Originally Posted by Racer_X View Post
I had to cut my nut in half .
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post #16 of 16 Old 03-08-2019, 09:23 PM
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Re: Neat light on the dash

Hello,

That sounds a lot like how Dad's '84 S10 Blazer is set up. When it was still mine, I converted it to TBI back in '05 using all factory parts and harness, plus Edelbrock TES headers. Then I bored a 2.8 intake and put a 4.3 TBI on it. Later that engine spun multiple rod and main bearings, so we replaced it with a '95 Camaro 3.4. Dad's got the Blazer now, and still drives it quite a bit.

It runs okay, but it could definitely benefit from at least an injector constant change. If memory serves, the "injector constant" value in the chip is a combination of injector size and engine displacement, so just adjusting that would help.

Jay Vessels
1982 Chevrolet S-10 Sport
2006 Pontiac Solstice
2017 Subaru WRX
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