Can my 89 k2500 run without air pump.

5

Asked by Sep 09, 2015 at 02:41 AM about the 1989 Chevrolet C/K 2500

Question type: Maintenance & Repair

Bought my 3rd adjustable fuel regulator kit and it was the jet billet with new
gauge and high pressure diaphragm and I can go up to 20 lbs. runs a lot
better....... However it still has a bog at 1/2 to 3/4 throttle from a dead stop
and if you pump the gas real fast it backfires through tbi.  I found out today
that the air pump was taken off and the holes were welded up on the exhaust
manifold and selinoid was taken out. But I think this causes the ecm to keep
the unit in closed loop therefore running bad when warmed up and also not
forcing more oxygen down the exhaust to prevent backfire. (See photo) can I
somehow get around this. It works with the temperature sensor that is by the
thermostat as well. Maybe trick the computer or wire a switch to the ecm

1 Answer

19,765

It won't make it run bad. As long as it doesn't have a vacuum leak it will be fine. BTW closed loop is good. It's open when cold and closed when warmed up.

Your Answer

Chevrolet C/K 2500 Experts

  • #1
    Rowefast
    Reputation
    290
  • #2
    COMETGUY61
    Reputation
    190
  • #3
    Andrew Olsen
    Reputation
    150
View All

Related Models For Sale

Used Chevrolet C/K 3500
207 listings starting at $3,995
Used Chevrolet C/K 1500
829 listings starting at $3,000
Used GMC Sierra 2500
158 listings starting at $5,795
Used Ford F-250
432 listings starting at $2,995
Used GMC Sierra 1500
1,161 Great Deals out of 66,239 listings starting at $1,750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.