showing 4x allowable fuel on emmisions test

1993 GMC SONOMA
225,000 MILES
Avatar
MARTIN2581
  • MEMBER
  • 1 POST
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
Jul 10, 2013 at 9:25 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 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.
Jul 10, 2013 at 10:54 AM
Advertisement