Question about 1999 Chevrolet S-10 Pickup
OK mate, see if we can get this sorted.....
When was the 3.6L V6 (I'm guessing an LY7) motor fitted to your VT and has it been running OK or has it always had this fault since being fitted?
400 codes from the ECU rings alarm bells that there is a compatibility problem with either the scantool and the ECU or the ECU and the engine.
I have struck issues in the past where all sorts of wierd things like you describe have been happening and it has been a poor earth to either the ECU or the engine block. (poor earths cause a LOT of problems and really random ones)
Transponder fault does not make alot of sense as it is only going to cause issues on startup, not once the engine is running.
I see the exhaust has been modified...are the factory Oxygen sensors for the 3.6L V6 fitted?
If you can give me some history of the repower ie: who did it, are the engine and ECU matched, where did the motor come from etc. It may give some more clues.
Posted on Aug 23, 2010
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Posted on Jan 02, 2017
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