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Joined: Apr 2003
Posts: 15
New CEG\'er
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OP
New CEG\'er
Joined: Apr 2003
Posts: 15 |
A leaking intake manifold gasket(s) caused ALL the above codes intermitently. Not MAF, not the IAC valve, not the O2 Sensors. Just an intermitent air leak that was worse when the engine was cold as the clearances were larger around the leak.
The gaskets were shot - a very poor design it seems as over time the rubber material deteriotes.
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Joined: Oct 2002
Posts: 2,408
Hard-core CEG'er
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Hard-core CEG'er
Joined: Oct 2002
Posts: 2,408 |
Welcome to the five year club!
Hope you cleaned the intakes out while you were at it.
"Those who cannot remember the past are condemned to repeat it" -George Santayana
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Joined: Aug 2001
Posts: 89
CEG\'er
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CEG\'er
Joined: Aug 2001
Posts: 89 |
does any one have pics of before and after cleaning??
R.A
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Joined: Oct 2002
Posts: 2,408
Hard-core CEG'er
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Hard-core CEG'er
Joined: Oct 2002
Posts: 2,408 |
TB Intake There are some after pics somewhere, just have to search.
"Those who cannot remember the past are condemned to repeat it" -George Santayana
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Joined: Apr 2003
Posts: 15
New CEG\'er
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OP
New CEG\'er
Joined: Apr 2003
Posts: 15 |
Yes cleanned out the upper and lowwer intake manifolds durring the repairs. They were VERY dirty and a real pain to clean. Used a commercial parts cleaner - forget what it is called as a get a gallon or so a year from a local engine rebuilding shop but it is water rather than xylene based and still cleans out the carbon deposits. Got really keen and used a dremel tool to clean up the intake ports a little as well as there we a couple of bumps in the casting....
Read an MSDS sheet on xylene, (the main component of most "carb" and throttle body, fuel injector cleaners) and it will curl your hair...
Cheers, William
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