Question about 1993 Ford F250

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1993 F250 351 ENGINE WANT START

SMOG PUMP HAD WENT OUT REPLACE D IT . RAN FINE FOR A DAY. NOW IT WANT START , IT TRIES TO START. HAS PLENTY FOR FUEL PRESSURE 40LBS. CHECK THE COIL , ITS FIRING , HOWEVER WHEN I CHECK THE SPAK PLUGS . SOME ARE FIRING SOME ARE NOT . SOME PLUG LOOK DAMP. ANY TIP WOULD HELP

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If spark plugs are dump it looks like they are getiing to much fuel on lt (flooded). The reason might be worn electrods, wrong ignition timing, clogged air filter, water in fuel etc.
I would replace spurk plugs, if wont help, wires and distributor cap.
Also air filter might need to be checked/replaced
More info you can get here
http://www.aa1car.com/library/cm1196.htm
Good Luck

Posted on Feb 01, 2009

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Scan it for codes, that would be the first thing. I think there is a way to short the OBD plug and you can see the codes in a light blinking on the dashboard.

Let me know if you can do that, or need me to look up the procedure. I know my 89 van had that capability, or to read a voltage bounces on two of the pins in the OBD plug connected to a meter.

Posted on Feb 01, 2009

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Welcome to Fixya! I would Start with New Plugs. Then Locate the Fuse Relay Box under the Hood, Find a Relay that you Know is Good and Swap it Around until it will Start and you will find the Bad Relay Causing the No Start Problem. Let me Know what you Get! Please Rate My Response! Thanks!

Posted on Feb 01, 2009

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