Skip the auto shop - Our mechanics make house calls

Q: Crank, No Start, replaced fuel and relay.

asked by on

My truck shut off on me as I was driving, after it died I turned the key and it cranks over but does not start, so I figured it wasn't the battery or alternator. I only pulled one plug wire off and tested it and I have spark. I then did everything imaginable to test the pump and relay. It came out to be the pump. I replace the pump and filter and still no fuel and the pump doesn't even come on. I get a relay and still nothing. I then tested to see if I was getting power to the pump, at the harness coming out of the tank I put a meter on those wires and I'm only getting 8 volts so I use a 12 volt battery with leads to jump the pump and it comes on but no gas come out of the line. I'm lost.

My car has 200000 miles.
My car has an automatic transmission.

A: When you applied power to test the pump dir...

When you applied power to test the pump directly, you may have had the power and ground backwards, and ran the pump backwards.

The pump connector that is only getting 8 volts should be replaced. The connectors are known to have a problem with voltage loss through the connectors due to corrosion. Replace the connector and it should fix your problem. Do not insert your big tester pin into the new connector or you may damage the female connector.

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My Check Engine Light was on, so I tried the paperclip trick to get a code and the light went out. Tested the bulb and it works

Since I cannot display an image on here, I will describe it best as possible. When looking at the diagnostic connector, is is basically a rectangle with flared tabs on one side. Consider that side of the bottom when viewing...

Q: No fuel pressure at all

Thats a good question. You could be correct, however, lets go further back and make sure we can't get your car fixed a little cheaper than going directly for the fuel pump. My first action would be to check the...

Q: Why are my ABS and brake lights on

Your ABS light is on for a reason - and you have some scary symptoms that underscore that the problem is real. Your Suburban is a pre-OBD II model, so you either need a code reader capable of reading ABS...

Related articles

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.