Showing 4x allowable fuel on emmisions test

MARTIN2581

MEMBER
1993 GMC SONOMA
225,000 MILES

93 gmc sanoma 2.8 throttle body injection. Just took it through emmisions 3rd time and failed again. Catalytic converter passes, test shows 4x allowable fuel gasses. Have changed injectors, egr valve. O2 sensor changed 2 years ago. No problems at all before I changed injectors now have reset computer every couple days to get rid of hesitation and sputter. Gas consumption hasn't dropped a bit. Im out of ideas

1 Reply

HMAC300

MECHANIC
48,601 POSTS

Scan for codes, on site here it tells how to do it and what codes mean look under obd1 Or you can try to chage oil and filter, air filter, take it on eway for about 15 miles then get it tested.

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Wednesday, July 10th, 2013 AT 10:54 AM