Question about 1995 Ford F250

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1995 ford f250 7.3 dissel runs rough

7.3 dissel starts right up, no smoke at all. it seems at about 1000rpm the motor is just runs rough shakes going down the steet. if you step on it it ahs plenty of power no smoke. Parked and ideling it seem to be doing the same thing rough. I have put fuel injecter cleaner in but still has not help. As I said runs down the highway at 70mph no miss no smoke, just when it gets down in the 1000 to 1200 rpm range.

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How many miles is on the engine?
If it's close to 140,000 miles then it's over due for timing chain and timing guide change.
A loose timing chain will offset timing.
===
Before you do the next oil change. Add a motor flush to clean out the internal parts and free up the rings.
This is the inexpensive method to restore some of the lose compression.
==== Do a 5-10 minutes high rpm highway ran (NO REDLINE).
This will blow out the soot in the exhaust system. ====
Check your vehicle emission batch under the hood.
If it's from California or has California emission then let look for the catalytic converter.
Over time it can become restructed.
As a test,loosen the bolts at the collector pipe and do a short test ran.

Please post any additonal information on the commect window. I will follow up on it.




Posted on Aug 24, 2009

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