Hesitation

[kaosracing625]

i have a 2000 chevy extend cab s10 with a 4.3 and i have a hesitation problem when i am accl and crusing i have no dtc or mill light and i just put a new dist in it becuase i couldnt get the timeing to advance more then -12degs retarted so i put the the dist in and could only get it to advance to -6degs we did the timing with a solus scan tool and then my teacher reamed out the dist hold down bolt hole and got it to go to 0 but i am confused on why this is and i still have a hesitation and now i am stuck when i put the dist in the hesitation did go away a little all my pids seem to look good any help will be great iv been chasing my tail with this my truck is also a 5 speed manual with 4 wheele drive

[Yogi]

Have you checked your fuel pressure?

[jakefiddlesticks]

wtf?
teacher reamed out the dizzy hole?
are you focking joking?

your engine has a PCM
performance control module
the dizzy is designed to only stab in one way for a reason.
the PCM automatically times the engine.
you can't adjust the timing, the PCM does it for you.

when timing your 00 4.3
you move the crank pulley to TDC top dead center 2nd mark on the pulley.
aim the rotor before cylinder #1 and stab the dizzy in.
when you start it, the engine will run rough for a minute or so.
this is because the PCM is learning the engines timing and adjusting itself.
if the engine doesn't run perfect after a minute or so or even start then,
the dizzy could be one tooth off. move it back one tooth and try it again.
i found that the rotor aims back more towards the #6 cylinder.
the dizzy cap should be marked for the engines cylinders.

Now that your timing is way off and you have the dizzy hole reamed out,
you are going to need a new intake manifold and a dizzy.
I have one off a 98 4.3 if you want it, send me a pm.

[Yogi]

Yeah, I forgot to mention that he also needs a new teacher.

[lesterl]

What kind of teacher, what was he teaching, Roach clips and their proper usage?

[jakefiddlesticks]

Quote: Originally Posted by lesterl

What kind of teacher, what was he teaching, Roach clips and their proper usage?

a hesitation teacher that didn't hesitate to make a non adjustable dizzy a adjustable one. lol. i can't believe someone would do that.

[kaosracing625]

we did find the problem yesterday at my school we hooked up the tech 2 to it timing and every thing is good and the hole he remed out was the dist hold down were the bolt goes through. but the timing we were gettting off the pcm was going hay wire due the my knock senser is pick up some time of vibration and keeps retarding my dist timeing. And for the teacher i found out all he did was put a big bandaide on it and he is on some serious meeds and i talk to my teacher too get another opinion and he wanted to see what was causing this and y my onter teacher did it and we found my Kn sensor voltage at 4.65 volts and i had high counts and did a comp test to see if its internal comp was good but when i turn the ac on it starts to retarted a whole lot so my ? is do you think the Kn is started to go and pick up some vibration or do i have another problem how do i find out if i my kn is just faulty is there a way to test it Also do you guys recomed that i got to a mpi system or do i keep the cpi system and were can i find a mpi system to do the swap
Thanks for the help

[The Blown Blazer]

Looks like you need a new english teacher too. Jesus.

Anyways, false knock can be sensed for alot of things. I didn't think the knock sensor on the 4.3 was really sensitive, but I'd check for anything loose or vibrating in the engine bay. You might just want to get a whole new knock sensor, since you'll be replacing alot of parts due to your retarded teachers mistake.

Alot of things control the timing on a 4.3. For general hesitation, check the MAF. Unhook it, and see if the hesitation still exists. If so, you've eliminated a common problem. Check your fuel pressure (as stated before), and get back with us if both turn out to be good.

Otherwise, practice the use of punctuation.

[Yogi]

Quote: Originally Posted by kaosracing625

we did find the problem yesterday at my school we hooked up the tech 2 to it timing and every thing is good and the hole he remed out was the dist hold down were the bolt goes through. but the timing we were gettting off the pcm was going hay wire due the my knock senser is pick up some time of vibration and keeps retarding my dist timeing. And for the teacher i found out all he did was put a big bandaide on it and he is on some serious meeds and i talk to my teacher too get another opinion and he wanted to see what was causing this and y my onter teacher did it and we found my Kn sensor voltage at 4.65 volts and i had high counts and did a comp test to see if its internal comp was good but when i turn the ac on it starts to retarted a whole lot so my ? is do you think the Kn is started to go and pick up some vibration or do i have another problem how do i find out if i my kn is just faulty is there a way to test it Also do you guys recomed that i got to a mpi system or do i keep the cpi system and were can i find a mpi system to do the swap
Thanks for the help

Please try to add some punctuation every once and a while. Without it your posts are hard to read.

Is the A/C making a lot of noise? Is the only time that the timing is retarded is when the A/C is switched on? Might need a new A/C comp., but I doubt it. You may have to try replacing the KS. According to this listing there are 2. Is anything loose and banging on the motor? Like an exhaust pipe hitting the frame? Check the KS wiring for kinks, frayed insulation, etc.

[roadlet_411]

Quote: Originally Posted by The Blown Blazer

Looks like you need a new english teacher too. Jesus.

You might just want to get a whole new knock sensor, since you'll be replacing alot of parts due to your retarded teachers mistake.

Hahahahaha

[jakefiddlesticks]

so hard to understand you. wow.
teacher putting a band aid on it? lol
i think we can all agree he focked it up.
i'd bet your knock sensor code is coming from how bad the timing is.
can you see or hear the engine knocking due to the retarded timing?
yes the ac comp puts a load on the engine when it's on.
you could have it vacuumed out and recharged then a performance test.
since your timing is already off, it gets worse with a load on the engine.

ultimately, you need someone who can really help you get the timing correct.
your choice on your reamed out intake manifold, i wish you would listen.
THAT DIZZY IS DESIGNED BY GM TO ONLY GO IN ONE WAY.
i would seriously replace the intake manifold so the dizzy can go in the correct way.
since your teacher reamed it out, have him pay for a new one.

[lesterl]

I think he means the hold down bolt was stripped. The sensor at almost 5v seems to me the sensor is bad, but the thing is only supposed to have a very small mV AC waveform on it anyway, make sure the wire is tight, might even pull the sensor wire off, should be 2 sensors I think, try the other one and see if it is one or the other bad.

[kaosracing625]

WOw this is a lot of info thank you. and sorry about the spell im not that great at. But today we are pulling my turck into the shop and do a few scope checks on it today with the o-scope. Also i made the mistake what we were watching on the scanner the the cam off set. But we are going to pull this dist. out also to make sure its timed right. And when i mean the reamed out the hole it the hole for the hold down its self not the manifoled sorry that was my mistake. I will let you guys know what we come up with and if i can i will post the pids and the scop patters if i can.

[Solid10]

Quote: Originally Posted by kaosracing625

WOw this is a lot of info thank you. and sorry about the spell im not that great at. But today we are pulling my turck into the shop and do a few scope checks on it today with the o-scope. Also i made the mistake what we were watching on the scanner the the cam off set. But we are going to pull this dist. out also to make sure its timed right. And when i mean the reamed out the hole it the hole for the hold down its self not the manifoled sorry that was my mistake. I will let you guys know what we come up with and if i can i will post the pids and the scop patters if i can.

drop out of school you are going to learn more useful information from homeless war vets on the streets.

[Yogi]

Quote: Originally Posted by Solid10

drop out of school you are going to learn more useful information from homeless war vets on the streets.

Bad advice!

[kaosracing625]

Wow i thought this was a sight to get good info well i did and i thank every one that helped me. but i found out that people are quick to bash me because i dont know a lot and thats why im in school. Yea my teacher may have rushed the diag, But you know what ever tech has been in the same place at least onece in there life. I no that im not the smartest person in the world and thats why i came to this sight to get some help. but i seems like i just get bashed. Yea i no that my one replay was sloppy and im sorry i was just in a rush all you had to do was say something, i would of rewrote it. Any thank you to all the guys that did help me and ill let you guys know what i find out to the one that did give me ideas.

[Yogi]

I think that most of the bashing was directed at your teacher that reamed out the mounting hole.

Anyway, click here for more info on converting to MPFI

[lesterl]

Just curious, I know people are making fun of the bad grammar and spelling, when I harrass someone (primarily my brother) about their spelling and grammar it is to get them to improve, or at least try to care.
My brother is as bad as yourself and it bothers me, it makes him sound unintelligent and I know that is not the case, as it is with most people. English is very important to get down as if you can talk, speak, and write the language well you can go places, if you dont learn the language it will hold you back, just keep in mind some people are trying to motivate you to do better, as it is IMPORTANT. I deal with customers every day, being only 28 in my field makes people, naturally, uncomfortable with my repairs, after a few minutes of talking with me they are almost always satisfied with everything I do, even if it isnt 100% because I am try to be and sound fluent in what I do and speak.
Let us know how the truck turns out, post up some pix of your scope readings and postings of what you find out as we all learn this way, if you arent learning, better check and see if you are breathing.
I do apologize for everyones bad or sarcastic comments, but hopefully you understand that the way you write doesnt come across in the best light.

[Solid10]

Quote: Originally Posted by kaosracing625

Wow i thought this was a sight to get good info well i did and i thank every one that helped me. but i found out that people are quick to bash me because i dont know a lot and thats why im in school. Yea my teacher may have rushed the diag, But you know what ever tech has been in the same place at least onece in there life. I no that im not the smartest person in the world and thats why i came to this sight to get some help. but i seems like i just get bashed. Yea i no that my one replay was sloppy and im sorry i was just in a rush all you had to do was say something, i would of rewrote it. Any thank you to all the guys that did help me and ill let you guys know what i find out to the one that did give me ideas.

eh yeah well, sometimes fcking up and learning the hard way is the best way...
I re-geared my rear end.
and learned a lesson i'll never forget