Question about 1989 Ford F 250

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Just changed my engine in 1989 ford f250 (351w) now I get fuel to the rails but not thru the injectors

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  • oatreehugger Dec 18, 2008

    Yes Angelo the engine was running till the piston in the no1 cylinder blew apart

  • Angelo Attard
    Angelo Attard May 11, 2010

    OK DO THESE TESTS



    CHECK FOR SPARK ?

    IF U HAVE SPARK REMOVE 2 SPARK PLUGS AND CHECK IF THEY ARE WET WITH FUEL OR SMELL VERY STRONG OF FUEL



    IF WET REPLACE WITH NEW ONES AND TRY AGAIN TO START



    IF THEY ARE DRY PUT SOME FUEL DONE INTAKE AND TRY TO START IF IT STARTS LET ME KNOW AND WE WILL GO TO THE NEXT STEP

  • Angelo Attard
    Angelo Attard May 11, 2010

    was the old engine a runner before u changed it

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Hook up a code reader to see if your ECM is functioning properly. Other possibilities are that your fuel relays are corroded, or a fusible link leading to the relays has blown.

Posted on Sep 22, 2009

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1991 F 250 5.0 was running not now has good pressure at the fuel rails nothing thru injectors


It could be the "Main Relay" or no spark.
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Hello: If this is a 4cylinder engine with the distributor on the back of the engine (toward the passenger compartment) I would rebuild/replace the distributor. Including distributor cap and rotor.

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1 Answer

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1 Answer

I have a 1989 Ford F-150 with a 302 engine fuel injected


Does that engine have a TPS (throttle position sensor)? If so, disconnect it from the engine and connect an ohmmeter to it, to check for jumps or bad spots at any position, from throttle closed to throttle wide open ... of course, with the engine OFF! There is a possibility that you have "slow" fuel injectors (meaning they may be gummed-up, so they react too slow to pulse width changes. But that could be cured by running a can of Seafoam through the tank, as long as the injectors are not damaged or leaking. Check the fuel pressure at the injector rails (if in fact it uses fuel injectors, which I don't actually know). It might have a carburetor, at that age. If so, how is the choke linkage ... perhaps stiff?

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1 Answer

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Start of with dry gas and injector cleaner now..... and c if you can drive it. next try ur fuel rail it may be gucked up inside.  any service engine lights on?

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1 Answer

1989 Ford Bronco 5.0 engine will not crank. Replaced fuel filter and fuel pump, but still will not start. Engine turns over and will try to crank with starting fluid.


Timing is everything. Try testing you PCM. It's the little gray box near the base of your distributor. If you have spark, and fuel at the rail (plus good fuel rail pressure) than the timing is your problem.

Check the pet-**** on the fuel rail assembly to make sure the fuel at the rail is under presure and getting to your injectors. Then again make sure you have spark, lastly you should be able to test the trouble codes to see if your PCM is the issue.
Goos luck.

Jul 20, 2008 | 1989 Ford Bronco

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