Quote:
Originally Posted by aklim
I'd say that scanner would help determine what the issue is. If it is emissions, decide for yourself. With EFI it adjusts itself so SOTP isn't reliable.
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89 no scanner, should be obd1.
My 89 chevy the service light turned out to be the egr valve was plugged, but that was a 4.3 throttle body injection. You probably have a similar setup