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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 15715
Experience:  GCM master tech over 25 years
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Gmc yukon: Have 03 gmc yukon drives just fine then loses throttle

Customer Question

Have 03 gmc yukon drives just fine then loses throttle pedal changed tps and pedal sensor worked for few day then starts messing up again
Submitted: 1 year ago.
Category: GMC
Expert:  Gary replied 1 year ago.
I am sorry your having this problemcan you tell me what codes are setting in the computer ?
Customer: replied 1 year ago.
Thats part of the problem its not throwing any codes on the dash
Expert:  Gary replied 1 year ago.
with a scan tool connected there are NO codes history or current in the computer ?
Customer: replied 1 year ago.
Cant get it to drive long enough to take it someplace to get scanned
Expert:  Gary replied 1 year ago.
is the reduced engine power being displayed in the dash ?
Customer: replied 1 year ago.
No not yet
Customer: replied 1 year ago.
Hooked up fuel pressure gauge its showed bout 45 psi
Expert:  Gary replied 1 year ago.
ok that fuel pressure is way below spec of 60 PSIif the reduced engine is not displayed the issue should not be the electronic throttle systemif this has a changeable fuel filter replace it and see what the PSI is if its still under 60 PSI key ON engine OFF then the fuel pump is badonce you get 60 PSI back of fuel pressure the truck should run fine