1991 GMC Sonoma Logo

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Anonymous Posted on Apr 19, 2017

Replaced lots of parts on this truck sat for 5 years , listed what parts are directly related to this issue , but truck starts and idles fine give throttle bogs down as if its flooding, not safe to dr

91 sonoma (s15) 2wd 5 speed, new pump, filter , injectors, cap , rotor, iac, fuel reg, spark wires, ran fine for about two weeks then started to die at lights then now as i drive, back fires through in take , starts up fine and idles good give it throttle bogs down as if flooding im good with cars and mechanics, but this has gotten me aggrivated i cant afford throwing many more parts and i work at a parts store ironically but im also a student and i need this vehicle to run dont like my grandmother having to pick me up and run me all over all the time , makes me worry about her, any ideas ?

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Joney Setati

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  • Posted on Apr 19, 2017
Joney Setati
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You changed the spark wires but did you change the plugs..and if its a carburetor check the distributer as well

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SOURCE: 91 jimmy 4.3 will not idle cold or hot

The distributor module and pick up coil

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Molson02536

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  • Posted on Apr 06, 2009

SOURCE: i have 91 sonoma 2.5 has fresh gas,good plugs,good

Check the vacum line to your fuel pressure regulator. Keep it simple and start with that, dubble check your firing order again. Good luck.

Anonymous

  • 74 Answers
  • Posted on Apr 24, 2009

SOURCE: 1994 sonoma stops running when it warms up

Replace you fuel Injector pump and check for any bad or clogged injectors. make sure idle adjustment screw is properly set 1ak+f4pj7cbm32cuniyi2gaaaaaelftksuqmcc

Anonymous

  • 278 Answers
  • Posted on Oct 14, 2009

SOURCE: 89 suburban. No spray from injectors after replacing ESC

The fuel pump should be in the 20s. Also it could be losing presure slowly. Leave the fuel pump pressure gage on for at least 2 to 3 hours to see if it is losing pressure - It's a start

Anonymous

  • 1 Answer
  • Posted on Dec 04, 2009

SOURCE: High idle at start up low or high idle during driving

massair frow sensor

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no car told maker or model or engine size.
there are lots causes that, hard starts
if spark good and strong and even HV spark wire sets fresh.
the short list.
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