Skip the auto shop - Our mechanics make house calls

Q: Installed new delphi fuel pump and fram fuel filter. still no pressure on fuel rail valve and wont start. 2003 Chevrolet Tahoe

asked by on

About 2 months ago my fuel pump went out. It died on me and i pressed the valve stem on the fuel rail and had no pressure so i dropped the tank and changed the fuel pump. soon as i did that i went back under the hood with the key on and it shot fuel out the stem and it started right up. drove it for a day and died again. pressed stem again and no pressure from pump. so i just changed it for a second time this time i changed it and the fuel filter thinking that was the problem. went under hood pressed stem and no pressure tried to start turns over and almost starts but just wont. what else can i do without going to mechanic as im very tight on money of course. any info very appreciated

My car has 175000 miles.
My car has an automatic transmission.

Hi there - I suspect you have weak power getting to the fuel pump. I would first check the voltage coming out of the fuel pump relay. If the contacts in the relay are burned, you will not get reliable current flow to the pump. Check the fuel pump ground as well (voltage drop across the ground, not just continuity). I recommend a fuel system inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Installed new delphi fuel pump and fram fuel filter. still no pressure on fuel rail valve and wont start. 2003 Chevrolet Tahoe

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: wipers don't respond to my commands. goes on highest speed and doesn't stop unless fuse is out

Hello, thank you for writing in. The issue is very likely a fault with the wiper switch. While there can be some electrical testing done to verify this, the switches are known to go bad after being used for that...

Q: 2006 GMC Envoy not going into gear

Most vehicles like yours will have a shift lock actuator which allows you to change gears when you press the brake pedal. Usually a slight click sound can be heard when the brake pedal is depressed to indicate that the...

Q: Hey there! I can't seem to find the location of my canister purge valve on my 91 Chevy G20 5.7L 350

On these vehicles, the canister purge valve is typically located either on top of, or just in front of, the fuel tank. It has been my experience that they are most commonly found mounted to the top of the fuel...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...