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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Chevy
Satisfied Customers: 3829
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles A6 - Electrical / Electronic systems A7 Heating / Air Conditioning systems
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2001 chevy tahoe 5.3 no pressure at fuel rail

This answer was rated:

2001 chevy tahoe 5.3 no pressure at fuel rail
Customer: replied 9 months ago.
I have no pressure at the fuel rail and i just replaced the fuel pump do to a "cranks but no start" issue

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

hey how are you

1- fuel pump relay : The Fuel Pump Relay is located in the Junction Block - Under-hood. The Junction Block - Under-hood is located at the left side of the engine compartment near the battery.

Now if you have dual tanks there is 2 fuel pump relay

I sent you location diagrams showing fuel pump relay in under-hood box and secondary relay attached to bracket on the under hood junction box

click on blue link to open diagrams

2- on fuel pump connector do you have power ,12 volt when you trying to start it checking with test light

3- crank but no start , we need fuel & spark to start ,what are we missing one or both?

4- at the fuel rail ,there is test port , no fuel there right . ?

5- check the circuit i sent you on the fuel pump relay and see what are you missing

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

are the injector fuses been checked ,15 amp fuse in the under hood junction box ,

are they pulsing ,look at circuit the PCM is the ground control for the injectors .


Please let me know if you need anything else on it, just reply back and we will continue

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Thank You
Chad Farhat
ASE Certified Technician

Hey man how are you

Just checking on you to see if you gt it resolved or you like addition assistance on it

Please let me know

Thank You

Chad Farhat

ASE Certified Technician1

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