Question about 1993 Ford Ranger SuperCab

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All cylinders full of fuel. 4.0L V6

Engine cut off and would not crank, pulled plugs and found all cylinders full of fuel. Pulled upper intake and found it full of fuel as well.

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  • slaeger Dec 27, 2008

    I also have a code 542 and i have not been able to find a flow chart to solve this problem as well.

  • slaeger Dec 27, 2008

    Its not a po542, po codes are obd 2 this truck is a 93 and is obd 1 the 542 code is fuel pump circuit open; pcm to motor and i am looking for a flow chart to solve the problem.

  • slaeger Dec 28, 2008

    Yes the regulator was bad, I will install it and replace the plugs and upper intake gasket. I will let you know if it fixed it tomorrow.

  • slaeger Dec 28, 2008

    the pressure regulator and a new set of plugs it fired right up and it had a small carbon knock for a couple of minutes and it cleared up and runs fine now. I cleared the codes and drove it about 20 miles and the codes did not return.

  • slaeger Dec 28, 2008

    the pressure regulator and a new set of plugs it fired right up and it had a small carbon knock for a couple of minutes and it cleared up and runs fine now. I cleared the codes and drove it about 20 miles and the codes did not return.

  • slaeger Dec 29, 2008

    The oil change was a given sorry I did not include that in the final solution. Thanks for your help.



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Sounds like the fuel pressure regulator diaphragm has ruptured. When this happens fuel is drawn in from the manifold vacuum and if the leak is severe enough the fuel pump pressure will push it in as well. The unit is a small component that resides on the fuel injector rail and will have a vacuum hose running to it. Remember you are working with GASOLINE and lots of it so be careful!

Posted on Dec 27, 2008

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  • Howard Lester Dec 27, 2008

    I am unsure if the two are related but it is possible. P0542....Intake Air Heater Circuit High. It is possible that the intake air is being cooled from the evaporating gasoline and it is driving the heater to the max to try to get it within acceptable parameters.

  • Howard Lester Dec 27, 2008

    Did you check the regulator? Just curious if it had a tear

  • Howard Lester Dec 28, 2008

    Two things, Make sure you change the oil as it will be full of fuel and it would be nice if you changed your assesment to fixya. Thanks and have a good new year.



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old post, im doing only no answer posts. my bag.
i bet its fixed and you didnt post back.
what country
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i guess v16 means 16v or valves. or is that a v6 , 6 cylinders.
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