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 1,000 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!
  1. Home
  2. Questions
  3. 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: Does the ignition coil replacement also include a new spark p

Spark plug replacement is not included as part of coil replacement service although if the spark plugs were suspected of being defective, or confirmed defective, you would be apprised of that and, if agreed to by you, replaced. Spark plugs...

Q: Master cylinder and brake booster leaking

Worn master cylinder seals can cause brake fluid to leak into the brake booster, damaging it. I'm guessing this is what happened to your truck. Replacing both the master cylinder and brake booster is the only way to solve this...

Q: Oil leaked out of car three times.

It sounds like you might want to seek the assistance of a trained professional. Oil pans can be difficult to install - the gasket must be placed just right, the bolts must be torqued correctly, etc., etc. Also, leaks that...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.