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

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: Smoke from engine and checked with nearby line lube express in petrol station. They said it's a problem with AC compressor bearing.

Hi there. The seal on the compressor to the air conditioning system has a leak and caused the oil and refrigerant to leak out of the compressor. The bearings on the compressor shaft are lubricated with the oil in the...

Q: Lights come on and minivan turns off

It sounds like a bad electrical connection is causing a loss of power somewhere. It can be very challenging to catch when it occurs so intermittently. Check the basics first. Test to verify a known good battery charged to at...

Q: will not keep a charge

The battery and charging system will need to be tested to see if the battery can be charged and handles a load test. If battery fails test then it should be replaced first. After the battery is tested and replaced,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.