running rough COP problem?
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Fleet Owner
Joined: Jan 2004
Posts: 26,007
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From: Brentwood,CA
running rough COP problem?
i posted this in the expy forum but thought i would get more help here https://www.ford-trucks.com/forums/s...d.php?t=376004
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Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
Could be a COP, but they also usually miss at all rpm's. I would try cleaning the IAC and the MAF. Also inspect the PCV hose, especially in the elbow behind the intake where it is connected. These are known to crack and can cause a vacuum leak.
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1969Highboy
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Mar 23, 2009 11:18 PM
