Question about 1997 Ford F250 SuperCab

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I have a 1994 f250 with a hypermax turbo upgrade and inter cooler i would like to know if there are any ways that i can get any more power out of the truck and also if you may have any ideas why the wait to start light only momentarly flashes and the truck is hard to start when its cold

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Hello,
Your 94' F250 must have a 7.3 I'm sure. Is your engine a factory 7.3 powerstoke or a normally asperated diesel? The solenoid pack for the glow plugs has been a real common culprit for these Ford diesels. The following is most likely your problem.
1-bad ground or poor ground at the glow plug solenoid.
2-Defective solenoid for the glow plug circuit.
3-Defective glow plug in the circuit.

Ok to check these problems you can do the following.
Check the ground by taking a DVOM and checking the resistance between the engine or chassis ground and the mounting bolts that secure the solenoid to the engine.
Then check for a min of 11.8 volts to the solenoid input post. Then check the output voltage to I believe the brown ouput wire to the glow plugs. Check the connection furthest from the sloenoid typicly at cyl. 1 and cyl 5. This takes two pepole. Have someone else cycle the key while you check the voltage. If the voltage is good but still the solenoid is cycling off too quickly disconnect the brown output wire to the glow plugs and cycle the key again. If the problem goes away test each glow plug's resistance for a direct short to ground or the wire arness. If the problem persists I suggest replacing the solenoid.

Posted on Jan 26, 2009

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