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Car doesn't start. Electrical is fine, can it be the fuel system?

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It could be the fuel, or a sensor. no fuel pressure, no start, or a bad relay

Posted on Sep 06, 2010

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Posted on Jan 02, 2017

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How do you know if the fuel pump or just the strainer is bad? i've had to "prime" the fuel pump (turn key forward) for sveral months now in order for the car to start if i dont, then im stuck...


I personally don't think its either. Do this for a living. You have an electric fuel pump and in most cases if they go bad it just plain doesn't work. If it was the strainer you would have problems with fuel pressure while running at all times. As far as having to "prime" the system you could be looking at a loss of pressure somewhere but sounds to me more like a relay or an electrical problem. What I am saying is that as you turn the key to "prime" it, you are maybe not priming it and its more of a hit or miss on the electrical problem. I would check to make sure your fuel pump relay is working. It should engage for about 5 seconds after you turn the key. You can feel if it is engaging by touching it when someone turns the key. Also there may be an ECM relay thats not engaging at all times. Are you able to hear the pump turn on when you turn the key? If yes when it will not start is there power (electrical pulse) on the injectors when it won't start? I would just hate for you to drop the gas tank for no reason and pay for a pump for no reason. Pumps are bad or not bad. Work or doesn't work in 99 percent of the cases. Fuel pressure doesn't change that much either. If there is a blockage it's there or not. Just my opinion and I hope it helps. Good luck.

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but is the fuel pump working.if you remove the air snorkel and spray intake cleaner into the intake while someone tries to start the car and it starts then you have a fuel problem.either the pump,plugged fuel filter,fuel injectors not working,dirt in the fuel system.check the fuel pressure if it doesn`t start when spraying cleaner into the intake.

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