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No one has said it yet but you may have a cracked intake manifold gasket. They cause the symptoms you are speaking of. It seems that some get the CEL with the crakced manifold gaskets and some don't. Mine had to get really bad before it started giving me a light.


Yeah, I was thinking that but kinda dismissed it because the test for vacuum leaks (spraying carb cleaner all over everything) should have revealed it... But then your next statement...

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By the way I couldn't get mine to show me that I had a bad gasket by using the propane test.


I don't know what the propane test is, but I'm assuming it's something similar to the carb cleaner thing?

I guess it's possible the IMG is shot...

I've considered the TPS as well, but I'm still not getting any codes, and looking through those other posts, it seems that the TPS problems coincide with CEL's and codes...

So no one thinks it might be the cats?

-Chris

Chris Perosi
Isuzu Editor Emeritus
OutdoorWire, Inc.