Quote:
Originally Posted by Wookie384
Check EGR. It's probably clogged.
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^^Yes definitely, check your EGR. With it clogged, you're not getting the right (or any) recirculation of unburnt HC and CO back into your combustion chamber.
I used to be a smog tech back in the day and it always sucked that CA law prohibited us from explaining what might be the possible issue with their car when it doesn't pass and customers would come back in saying that they had spent up to thousands of $ trying to rectify the problem.