Random Fault Code 22 & 32 - Team Camaro Tech
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post #1 of 4 (permalink) Old Mar 12th, 13, 08:39 AM Thread Starter
 
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Random Fault Code 22 & 32

Hello all,
Same vehicle as my 'no start' post; 91 Z28 5.0L 5-speed, but this is a problem that existed prior to the no-start situation. (thanks again for all the help on the no-start)

On short trips (<10 miles) the car runs perfectly. Starts great, runs smooth and energetic. But somewhere after 10 miles and only seen on the interstate where speed around 70mph. The car will intermittently start to shudder. It is enough to be noticeable but not so much that there is any loss of control or anything. Often times the SES light will come on (but not always), but as soon as the key is turned off whatever code was thrown is lost.
Finally yesterday I was able to capture the code. Turns out there are 2 of them - 22 and 32.
I know the description for each of these, but am not certain about how they might be related.
Could it be that the troublesome TPS is actually bad and is overfueling (or underfueling) causing the EGR fault? I have trouble with that because it runs so well on short drives in the city where there is constant throttle change.
Is it more likely that there is truly a short in the TPS wiring somewhere that is affecting EGR handling?

So, certainly there are several items to be checked, but any direction would be great.
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post #2 of 4 (permalink) Old Mar 12th, 13, 10:12 AM
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Re: Random Fault Code 22 & 32

I would think, if a TPS problem, it would be all the time.
I'm thinking EGR valve as when it warms up, and ECM starts EGR process, the valve may not close all the way.

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post #3 of 4 (permalink) Old Mar 13th, 13, 04:54 PM Thread Starter
 
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Re: Random Fault Code 22 & 32

Claiming victory again!

Seems the problem was the front port of the EGR Solenoid module connection. It was not seated/sealed properly and sometimes would lose vacuum.
Sealed that up and she runs great!

Now how to clear those codes...my scan tool doesn't seem to want to do it!
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post #4 of 4 (permalink) Old Mar 13th, 13, 05:35 PM
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Re: Random Fault Code 22 & 32

Pull the ECM fuses for about a couple minutes.
Then drive the Camaro again for the ECM to relearn.
The more you drive it, the more the ECM compensates/learns.
Congrats on the find. Visual inspection is always a good tool.

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