In my 91, I am having acceleration sluggishness something terrible. The only code I am throwing is a 32. I did exhaust mods a while back and assume that is the root of my code 32. Am I coorect to assume that the 32 and my sluggishness are not related?

Where should I start looking on the sluggishness issue. It idles strong but when I take of there is a very noticeable hesitation.

Thanks

 

code 32=EGR circuit

 

Sorry I may not have been clear. I know what the code 32 is and I had actually put in a new egr valve in a little over a year ago but I am still getting it. My question was could the 32 cause my acceleration problems?

 

Oops sorry, I don't know enough about the EGR valve to give an answer.

 

It sounds to me like your problem might be more than just the code 32. Correct me if I'm wrong, but I believe the ECM determines there is an EGR problem based on the info it receives from the O2 sensor. I accidentally did this in my truck once when I plugged the EGR solenoid vent off with a cap, thinking that it lost the cap. The SERVICE ENGINE SOON light would come on - sometimes I had to drive over 20 miles for it to come on.

The reason it came on was because just as the service manual states "With the EGR valve closed and the O2 sensor fluctuating normally, fuel integrator counts will be greater they they were during normal EGR operation. if the change is not within the calibrated window, a Code 32 will be set"

I seen to remember the GM uses two different kinds of EGR valves and one uses exhaust pressure to keep it closed and another one uses it to open it. I can't remember though, and am probably wrong.

I'd disconnect the EGR temporarily and see if the code doesn't reappear. The way I look at it the ECM knows something is amiss with the EGR because of the strange way combustion is taking place. If that helps. maybe you need another prom. Is the only thing that you changed the exhaust?

 

I wonder if you have an aftermarket exhaust or have gutted or removed the cats? This will sometimes cause a code 32 on an L98, especially it seems the later style.

Do a search on the C4 Tech forum of code 32 and you will get a lot of information. Check the archieves as well.

I know David-F has been messing with this code in later years he may see this and let us know what he thinks.

It can be complex, but has to due sometimes with back-pressure and the type of EGR valve used. Then again, with no exhaust mods it could just be a normal failure of the EGR system. Could be just the temp switch or solenoid or vacuum leak or carbon build-up on the EGR valve.


Pete

 

Like PeteL said, sounds like you may have gutted your cat and the code 32 is the aftermath. The sluggishness may be due to a less restrictive exhaust, or the EGR selenoid is in an open state all the time. Anytime I have dealt with a 32, it does not do anything to performance.

 

Hey TH,
I remember your mods and the new egr valve you installed.I cant remember if you were getting this code after the exhaust work.If I remember correctly,you have a new main cat (not gutted) and a new (no pre cats) Y pipe and flowmasters on the back.
Last time we ran the scanner on it,I didnt see the code 32 come up.

So if this didnt happen right away or after the exhuast changes,I wouldnt think the exhaust change would affect it that much.

Almost sounds like the egr isnt opening at part throttle causing the stumble you feel.
Check your vacuum lines to the egr and see that it isnt broken or came off.Check all the plastic lines in there around the plenum and etc.
Can you tell us if this code was there since the exhaust mods? I cant remember for sure but dont remember you having that issue.

:)

 

For get about the code 32 for now that is not the cause of the performance problem that is probably something else, tell us a little more about your car, auto ? stick ? when does it feel sluggish ? when was the last time you changed the fuel filter ? have you checked the ignition timing? Also how is the idle? Just need a little more info.

David Fulcher

 

Great to see David F here to help...hes always been right about what to look for.
Maybe it isnt egr related,hmm?Hope its an easy fix and thanks David for helping out here as always.I know TH and worked with him on his car before so Im anxious to hear and see it get running right again so ill watch this thread.

Hey TH,
For now,I need you to check something...go under the car on the drivers side and see if the o2 sensor came loose.It has the purple wire on it...I remember last time I was there,the wire was sitting a little close to the Y pipe hanging down and Im not sure if you tied it out of the way since then.
Also,my car,2 times the 02 sensor came loose on that same walker Y pipe and I didnt know why.Never happened before and I always made it tight.Check that too.
Not saying this is your fix but check it anyway in case since It may have come loose like mine did.The o2 bung threads seemed good though.
:)

 

Sorry for the late response.

I will check the O2 sensor when I get home Bill.

Here are more details, at a dead stop I am idling perfect no misses or anything I can sense. If I ease into the peddle from a dead stop I almost immediately feel it missing/hesitating. If I hammer it, there is hesitation and then a slow curve up on acceleration. Same thing if I nail it going about 40MPH. Last night I had the cruise control set on 61mph and as the road inclined and the car needed gas to maintain 61MPH I could feel it missing.

The other thing that happened yesterday was it flooded when I tried to start it after it had been driven for 15 miles and sat for 20 minutes...hit the ignition it fired and ran for 30 second, did the same thing again, third time I hit the gas just a smidge when trying to start and then it was flooded. Started fine 15 minutes later. Have not checked anything yet but hoping to track based on your suggestions this weekend.

Thanks!
TH

 

Hey TH,got your mail and will send you one later.Do you have a fuel pressure guage at home? If not you need to get one so you can check the pressure to see if its where it should be.
Also hope david F chimes in too..the problem you listed,to me can be a few possible things...Ill wait and see what some other think first.
Ill talk to you soon.

:)