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post #1 of 3 (permalink) Old 09-12-09, 01:31 PM Thread Starter
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confused 93 Mustang 5.0 problem

I have a 93 Mustang LX w/ 5.0L engine with 103,000 miles on it. Recently the engine began losing compression and backfiring when in low gear, either starting from a dead stop or going up a hill). It happens when the engine is cold or warm.

Any suggestions on what the problem is?


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post #2 of 3 (permalink) Old 09-12-09, 05:01 PM
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Re: 93 Mustang 5.0 problem

Has it had spark plugs or fuel filter lately? Any check engine light on? Cleasning the IAC and MAF also help them run better.
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post #3 of 3 (permalink) Old 09-28-09, 02:49 PM
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Re: 93 Mustang 5.0 problem

You said it's losing compression. Is that a gut feeling or did you do a compression test? If so, usually it's 1 or 2 cylinders which are low and require further diagnosis.
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If compression is actually OK, first place to check a misfire is the secondary portion of the ignition system (plugs, wires, coil).
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