1988 GMC S15 Flooding

  • 1988 GMC S15

1988 GMC S15 4 cyl Two Wheel Drive Automatic

I have a 1988 GMC S15 in my shop and it will flood without cranking, only goes 30 mph, fouls spark plugs, and its hard to start hot or cold. We put brand new distributor caps, spark plugs, wires, rotor button, tried a different map sensor, removed the catalytic converter, did a compression test all cylinders were 100 lbs.

Do you
have the same problem?
Wednesday, April 21st, 2010 AT 9:48 AM

1 Reply

  • 49,757 POSTS

If this is a 2.5 and I think it is, they had a problem with the reluctor in the dist cracking. The distributor has to be replaced to fix this. As the TBI picks up pulses from the distributor to put fuel in this may be your problem. I've had the same problem with a V8 though with the same problem. I've been unable to find anything or diagnose what's wrong with it. Multiple items have been replaced and still the same problem. With yours that is the only thing I can think of unless your fuel pressure is to high. A TBI unit should only have 9-11 p.S.I.

Was this
Wednesday, June 16th, 2010 AT 7:33 PM

Please login or register to post a reply.

Recommended Guides