the fuel pumps good on a 1991 Dodge van B250 but wont turn over is the relay the only thing needed to be check?
YES IT WILL. It must have 9 to 13 LBS. of pressure NO less and NO higher or you will have problems.
If the fuel filter is clogged, or a new filter is installed backwards, it will prevent the fuel from reaching the combustion chamber and prevent the veficle from starting.
possible fuel pump problems, fuel pressure regulator problems, fuel filter plugged, air filter clogged, charcoal canister plugged. There are several issues that need to be checked. The above are places to start
Does it have fuel/spark/compression?
Its called auto start stop to save fuel
Not just one. It will still start but will miss.
this question makes no sense ? i assume you mean prevent the car from cranking??? if so then no. a bad fuel pump may stop the car from running or starting but it should not stop it from cranking. a bad fuel pump relay could stop the car from cranking but that would depend on the year make and model of your car.
I have problems whit the Injectors fuel on 6520 John Deere Tractor, same times the engine stop and wait for few seconds and. start again.
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Fuel delivery problems.
Yes, along with many other causes a bad fuel pump relay can cause a no start. The fuel pump relay provides power to the fuel pump.
That truck has two fuel injectors in the throttle body. I doubt that both are bad. I would suspect the fuel pump is faulty.