throttle body dumping lots of fuel.

20

Asked by Apr 02, 2011 at 12:15 AM about the 1989 Chevrolet S-10

Question type: Maintenance & Repair

89 4.3 ltr. model 220 TBI dumping waaayyy to much fuel & flooding engine. Could that be the pressure regulator on top.

5 Answers

65

i have a 91 2.8 tbi that was doing that. I replaced the hall effect switch and pick up coil along with the tps sensor. all parts ran me round 40$ im not sure wich one fixed it but it got fixed!

3 out of 3 people think this is helpful.
65

the distributer has a lead to the ecm to tell the fuel injector when to open and close. the hall effect switch detects a load on the distributer i.e. acceloration. and adust the spark and fuel accordingly, normally if the service engine light doesnt read a code 21 and the spring in the tps is springing back into pos. then the tps is good.

1 out of 1 people think this is helpful.
20

Thanx. Rebuilt presre. reg on throt. bdy & replaced plugs,wrs.cap,rotor,ect. then it started poppin' & pingin'. cometo find out coil was bad too. But I bought the truck for $400.00 & put about $65.00 into it, with oil change,& $25.00 worth of gas.Runs & drives like a champ now. Thanx again for your input.

2 out of 2 people think this is helpful.
130

I'm having the same fuel dumping problem in my 88 s-10 4.3 can't find hall effect location. ..hhelp

13 out of 13 people think this is helpful.
30

I have a 89 gmc with the 2.5l 4 cylinder and its dumping too much fuel after I put a new injector in it, it's like the injector is stuck open. what's causing it?

3 out of 3 people think this is helpful.

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