Engine won't start

Do you have a check engine light On prior to this problem?

If the engine's condition is in tip top shape-do below to determine if its fuel or spark problem that's if its cranking over and refuses to start

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a spark plug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light.

This guide will help us.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

While driving the engine just died. Put in new fuel pump ran for a week and just died again. Checked voltage at fuel pump,only has 6.7 volts.

Hey RICHARD,

I am wondering if the battery has shorted out, do you have good voltage across the battery terminals. I would replace the fuel pump if the battery checks out. Here is a guide on it's location.

Please let us know what you find so it will help others.

Best, Ken

I checked the oil level and found it was about 2 quarts low so I added oil. It still wouldn't run. I had it towed home and put it on a battery charger. Both batteries read 12.5 volts. I then replaced the Cam Position Sensor. None of this helped. It fires right up but will not run. Help!

check your fuel pressure it should be 40-60psi keorthat is operating pressure primary pump

Don't want to sound too stupid but can you tell me where I should disconnect my fuel line to check the fuel pressure?

you have to disconnect the fule line at the outlet of the fuel pump. install an adapter and get a reading of 45-80 psi. if not make sure regulator is not full of debris if it is clean it out and test again. if still low replace pump.

Ok I'll try that. One more bit of info. I have checked the fuel filter resevior (where the filter is) and it was full before the engine started and after it refused to run. Is that any indication that there is enough fuel pressure?

what do you mean by fires right up,but will not run?

I turn the key and wait for the glow plug light on the dash to go off. As soon as it goes out, I turn the key and the truck starts. It runs for about 5 seconds and then dies. Even if I put the pedal to the floor or pump the pedal, the truck only runs for about 5 seconds. If I turn the key off and then try to start the truck again, it starts right up and only runs for about 5 seconds again. So I replaced the glow plug relay and that seemed to fix it. Thanks for your help.

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.