Confused 87 Owner
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
The symptoms do sound like your IAC is giving you trouble.
I have not had any trouble with mine so I'm only going by other stuff I have read.
Definately a good idea to take it off and clean it if you havent done this already. Doesn't cost you anything, just be careful with it. There are very precise instructions for puting it back together that I hope someone else will add.
Good luck.
I have not had any trouble with mine so I'm only going by other stuff I have read.
Definately a good idea to take it off and clean it if you havent done this already. Doesn't cost you anything, just be careful with it. There are very precise instructions for puting it back together that I hope someone else will add.
Good luck.
Drifting
Joined: Feb 2005
Posts: 1,592
Likes: 3
From: St Louis MO
Originally Posted by PierEagle
You might also (or not) clean the IAC and seat. If you do, make sure you retract the pintle a little bit before you reinstall. It will then reset itself when the engine is started and then the ignition turned off.
Good luck.
Good luck.
Drifting
Joined: Feb 2005
Posts: 1,592
Likes: 3
From: St Louis MO
Originally Posted by PierEagle
You might also (or not) clean the IAC and seat. If you do, make sure you retract the pintle a little bit before you reinstall. It will then reset itself when the engine is started and then the ignition turned off.Good luck.
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Originally Posted by BillyBilly1975
After installing the new ignition module to the distributor, it took 2 attempts to start and when it started it ran very rough. I drove for about 30 minutes and it seemed ok but not great.
Thread Starter
Advanced
Joined: Jul 2004
Posts: 53
Likes: 0
From: Kettering OH
Confused 87 owner
Thanks Morley for the input, the module was the cheap part from Auto Zone, they didn't even offer me the GM part
Guess I will have to keep calling around to find one.
The car ran really well today though; go figure
The first time I drove for about 20 minutes and then for about 45 minutes after it sat for about 30 minutes (regular city driving) before I drove another 15 or 20 minutes and then waited 4+ hours before driving a short distance.
Tonight, I drove to the drive-thru about 5 minutes from home and the car was wanting to stall while I was waiting in line so I decided I would drive some more and see if the car would act up. The most consistent thing I have noticed is that shorty after I really start having fun and I need to decelerate that the car misses while driving or wants to stall at intersections.
I drove on the highway for about 20 minutes at a decent speed then drove back roads for an hour or so and had the opportunity to really let it out during the last thirty minutes before I got back into city and didn't have a single hint of anything being wrong.
Several posts have referred to the IAC as a possible culprit; I don't have much knowledge about IAC, would someone please enlighten me.
Thanks again for all your responses, you are so generous with your time, I truly appreciate your effort.
Have a Blessed day,
Amber
Guess I will have to keep calling around to find one.The car ran really well today though; go figure
The first time I drove for about 20 minutes and then for about 45 minutes after it sat for about 30 minutes (regular city driving) before I drove another 15 or 20 minutes and then waited 4+ hours before driving a short distance.Tonight, I drove to the drive-thru about 5 minutes from home and the car was wanting to stall while I was waiting in line so I decided I would drive some more and see if the car would act up. The most consistent thing I have noticed is that shorty after I really start having fun and I need to decelerate that the car misses while driving or wants to stall at intersections.
I drove on the highway for about 20 minutes at a decent speed then drove back roads for an hour or so and had the opportunity to really let it out during the last thirty minutes before I got back into city and didn't have a single hint of anything being wrong.
Several posts have referred to the IAC as a possible culprit; I don't have much knowledge about IAC, would someone please enlighten me.
Thanks again for all your responses, you are so generous with your time, I truly appreciate your effort.
Have a Blessed day,
Amber
Last edited by BillyBilly1975; Aug 4, 2005 at 02:06 AM.
Instructor
Joined: Jun 2005
Posts: 243
Likes: 0
From: Lakeland Florida
One thing I haven't heard anyone mention was the ERG valve and/or EGR Vacuum switch and the vacuum lines to both.
If the egr is sticking open, even the smallest amount it will allow way to much flow back into the intake thus making it run horrid and if enough air is leaking by it will stall.
The EGR vacuum switch is normally open when not powered. The ECM should energize the EGR vacuum switch as soon as the key is turned on and close the switch. I'd check this as it's a inexpensive repair.
GM EGR's are know to stick and get plugged up with carbon and as a secondary note always be sure to replace the EGR with the same number that is stamped on the base of the valve itself....This will save you headaches later.
Read this other thread
Just my 2 cents,
Jess
If the egr is sticking open, even the smallest amount it will allow way to much flow back into the intake thus making it run horrid and if enough air is leaking by it will stall.
The EGR vacuum switch is normally open when not powered. The ECM should energize the EGR vacuum switch as soon as the key is turned on and close the switch. I'd check this as it's a inexpensive repair.
GM EGR's are know to stick and get plugged up with carbon and as a secondary note always be sure to replace the EGR with the same number that is stamped on the base of the valve itself....This will save you headaches later.
Read this other thread
Just my 2 cents,
Jess
Last edited by jessepatty; Aug 3, 2005 at 10:25 PM.
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
From my limited knowledge the EGR is also a place to check.
All of these things are things I either had cleaned or replaced in the first month of owning my car.
I would do the EGR valve first because it is cheap and easy to do.
The IAC is on the side of the throttle body.
It would be a good idea to take it all off and clean it.
Sounds like you need a Helms manual.
Someone else may be able to give you instructions on how to do it.
Not very hard to do, just need to watch out for the IAC pintle when puting back together.
All of these things are things I either had cleaned or replaced in the first month of owning my car.
I would do the EGR valve first because it is cheap and easy to do.
The IAC is on the side of the throttle body.
It would be a good idea to take it all off and clean it.
Sounds like you need a Helms manual.
Someone else may be able to give you instructions on how to do it.
Not very hard to do, just need to watch out for the IAC pintle when puting back together.
