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Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 23979
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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97 Chevrolet Tahoe LT 5.7L 4x4 hard to start when hot or

Customer Question

97 Chevrolet Tahoe LT 5.7L 4x4 hard to start when hot or warm but starts fine when cold.
Submitted: 8 months ago.
Category: Chevy
Expert:  Dan replied 8 months ago.

Hello, my name is ***** ***** I'm here to help get your problem solved.

Expert:  Dan replied 8 months ago.

Have you done any testing or has anything been replaced yet? Thanks.

Customer: replied 8 months ago.
I have replaced crank sensor, the coolant sensor, I put AC delco spark plugs in. Replaced the distributor cap and rotor. I have replaced the spark plug wires.
Customer: replied 8 months ago.
no CEL
Expert:  Dan replied 8 months ago.

Based on symptom alone it sounds like a problem with fuel pump. Check fuel pressure next time it doesn't start and compare to when it does start. If fuel pressure is lower during no start then replace the pump. Let me know if you have more questions or if there is anything else I can do to help. Thanks.

Customer: replied 8 months ago.
Well I mean would it be a fuel pump if it starts fine when it's cold? It only hesitates when it's warmed up and hot
Expert:  Dan replied 8 months ago.

Yes, when fuel pumps first start to fail they usually work fine when cold then act up when warm. Let me know how it goes or if you have more questions, thanks.

Customer: replied 8 months ago.
Ok will do
Expert:  Dan replied 8 months ago.

Sounds good, keep me updated. Thanks.