Engine Performance problem
1991 Ford Ranger 6 cyl Two Wheel Drive Automatic 152000 miles
Problem started over a year ago. 3.0 L Engine idles extremely rough, or not at all, when started cold. The problem disappears after approx 60 secs. Then starts fine the rest of the day. I've found I can shorten the duration of the problem if I start and immediately force the rpms to 1500 or greater for about 15 secs. Last time I checked (6 mos ago), there were no computer codes. I've replaced the IAC, fuel pump and filter, cleaned the MAF sensor. Symptoms are very much like the Ford 4.0 L problem which requires a timing belt tensioner and new lower intake manifold O-rings/gaskets. I put in a short block in 2004, around 125,000 miles; this problem did not begin until late 2007.
have the same problem?
Thursday, September 10th, 2009 AT 11:51 AM