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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Crank, No Start, replaced fuel and relay.

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: Can I have my jump starter plugged in to an outlet as if i was charging, then connect it to a batter and turn it on? Will that cha

If the vehicle battery happens to be more than 5 years (60 months) old, don't bother fooling with it. Buy a new battery and be sure the new battery is fully charged by the store before you install it, otherwise...

Q: Fuel pump relay will not kick in

There are a number of "switch connections" that all have to be successfully closed/connected in order for the fuel pump relay to be energized. These include: whatever security mechanism may allow/disallow a "Start" sequence, the ignition switch itself, a Neutral...

Q: What can cause the RPMs to go super high while driving at one constant speed?

Hi There, It sounds like you are describing the symptoms of a failing throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the...

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...
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 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...