Somebody please help me out!....
I got a 1994 Ford Ranger 3.0 V6 manual 5 speed 4x4 with 231,000 miles. I bought it about a year ago and CAN NOT fix this rough idle and misfire issue. I have done a complete tune up on it, new plugs, wires, distributor cap, rotor, IAC valve, MAF, New injectors, intake gaskets, ignition coil, TPS, Checked vacuum lines, compression test, everything I can think of. I have spent hours reading the 3.0 rough idle stories. When I first start it up, it runs and sounds good for a few minutes until idle comes down to about 750 and its rough. Also, going down the highway is fine, until it's in OD lugging up a hill or around 2000 rpm it misses and bucks every 5 seconds or so. Any ideas?