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Category: Ford
Satisfied Customers: 24150
Experience:  ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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1998 Ford Ranger XLT: cylinder engine..roughly (sounder..vacuum leak

Customer Question

I have a 1998 Ford Ranger XLT with the 4-cylinder engine and 5-speed transmission. It will turn over will "NOT" start. Just prior to this it would run , but roughly (sounder like a vacuum leak). I have changed the spark plugs, spark plug wires, fuel filter, air filter, oil, oil filter and PCV valve. Gauges, lights, turn signals and radio all work. Can't find a fuse that is blown. Any ideas?
Submitted: 4 years ago.
Category: Ford
Expert:  AMEDEE replied 4 years ago.

Does the check engine light come on with the key on for a bulb check?

Does it go off while cranking the engine over?
Customer: replied 4 years ago.
No, the "check engine" does not come on or any of the other dashlights or warning indicators. Nothing happens on the dash while the engine is cranking.
Expert:  AMEDEE replied 4 years ago.
You could have a wiring issue or even a bad ignition switch or a blown fuse. Your check engine light NEEDS to come on with the key on for a bulb check. If not, your computer is not awake and your engine will not start.
Customer: replied 4 years ago.
I forgot, I also unhooked both of the battery cables to allow the computer to "reboot". But this did not work either.
Expert:  AMEDEE replied 4 years ago.
Well this is your problem! Your computer is not even awake! Chances are you are missing a power or a ground to the computer causing it not to wake up. The only other possibility would either be a bad computer or the computer is being shorted out by another computer or a sensor. I would start by checking all powers and grounds going to the PCM. THis includes all powers from all fuses, fusible links and even from the ignition switch.

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AMEDEE and 2 other Ford Specialists are ready to help you
Customer: replied 4 years ago.
Which fuse block is the most likely culprit. The one in the engine compartment or passenger compartment? Also, what about that loose wire I found?
Expert:  AMEDEE replied 4 years ago.
Any fuse that powers up the computer or the ignition switch can cause this issue.

Do you know what circuit this wire is from?
Customer: replied 4 years ago.
Expert:  AMEDEE replied 4 years ago.
Ok.. if it is part of the circuit that powers up the ignition switch or computer, then yes.. it could be related. If not, then no.