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Amedee, GMC Technician
Category: GMC
Satisfied Customers: 26431
Experience:  ASE Technician advanced level specialist
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Gmc sierra: I have a 1991 gmc starts right up runs few

Customer Question

I have a 1991 gmc starts right up runs for a few minutes then dies replaced fuel pump and fuel relay still does the same thing
Submitted: 1 year ago.
Category: GMC
Expert:  Amedee replied 1 year ago.
Hello and welcome! My name is ***** ***** I can assist you with your question. Does the engine start right back up when it stalls out or does it take some time before it starts up again? What is the fuel pressure at when this happens? What size engine do you have?
Customer: replied 1 year ago.
don't know fuel pressure have a 350 ci and it starts right up again
Expert:  Amedee replied 1 year ago.
If the engine starts right up when this happens, and it just stalls out at lower engine rpm, then I suspect either an idle issue (possible vacuum leak), bad TPS, MAP or idle air control valve. If the problem happens at all engine rpms, then it could be a bad pickup inside the distributor (which is very common). You will want to ensure that the fuel pump has power when this happens before replacing anything.
Expert:  Amedee replied 1 year ago.
I am glad I can help! It has been a pleasure working with you. Please dont forget to honor your good faith deposit by rating my answer as "Excellent Service" for assisting you today. Please let me know if you have any further questions.