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My 1990 7.4l v8 chevy engine cranks but does not start it was running i turn it off went to restart it but all it does is turnover why

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  • Cars & Trucks Master
  • 1,335 Answers

Have you checked for fuel delivery and spark ?

Posted on Dec 18, 2016

Testimonial: "sorry but i check both had to replace my ignition coil but still no start it sputter once'"

  •  SeabeeMechanic
    SeabeeMechanic Dec 21, 2016

    Do you have a scan tool to check for any codes in the ECM ? This could help to determine where the problem is at.

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The s10 have a fuel shut off relay to shut off fuel supply in case of an accident. They also have a anti-theft system that prevents fuel in case of theft.Pull the fuel line off and crank the engine to see if you get fuel. Sorry I can't be of more help but without hands on vehicle it is hard to tell.Also your fuel pump maybe sounding like it is pumping. In other words it may be running but not pumping fuel it mat have a ruptured diaphragm in the pump.The pump is running but not pumping fuel. Pull the fuel line off at the fuel filter and turn on ignmition or crank the engine you should have about 50PSI coming out.If you don't install new fuel pump.These vehicles are common for this problem the fuel pump runs but does not pump fuel or not enough pressure these vehicle require 57 PSI to start if it has less than 51PSI it will not start unless you use starting fluid then it will run.It will run with less fuel pressure it will just not start with less than 57PSI.

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It has nothing to do with ECU and immobiliser even if you turn your ECU OFF your car will start and will your but not properly without CPU your car will work in emergency mode. try finding Idle sensors and check them if they are ok

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My 1997 Dodge Avenger's engine won't start


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