1991 S-10 running rich

Tiny
DOZER202
  • MEMBER
  • 1991 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • MANUAL
  • 278,000 MILES
1991 chevy s-10 4 cyl 2.5 vin code E running very rich. I replaced the oxygen sensor, coolant temp sensor, map sensor and air sensor in the intank manifold. I can uplug 3 sensors and make it go into open loop and it runs good, but fuel economy suffers. The tailpipe is shooting out black smoke indicating the running rich, any help is appreciated.
Do you
have the same problem?
Yes
No
Thursday, January 6th, 2011 AT 1:57 PM

1 Reply

Tiny
HMAC300
  • EXPERT
Read your enginecode to see what has screwed up on it. But because you disconected sensors you have to start over. Pull the ecm fuse for 30 seconds then start truck and let lightcome on. Shut engine off and take a paper clip and cross a&b at the aldl. Count eh flashes tehn come to the site here and look under diagnostic codes OBD1. Go from there.
Was this
answer
helpful?
Yes
No
-1
Thursday, January 6th, 2011 AT 6:08 PM

Please login or register to post a reply.

Recommended Guides