I have a 1992 supercab F-150 2wd with a 5.0 motor. The motor has around 20000 miles on a new rebuild. My problem is rough idle. The car runs ok at 2000 rpm or so, but will not idle. No check engine light, no fault codes. I noticed some green smoky buildup on the motor below the exhaust manifold (by the smog pump.) I tried changing the fuel filter and air filter; no change. I also upped the idle set screw a good bit, but it still wont idle below 1500rpm's or so.
Any advice u guys can give me is greatly appreciated.
-ps, the truck is at around 140000 miles on the speedo.
Friday, February 23rd, 2007 AT 7:54 PM