Engine Performance problem
1990 Jeep YJ 4 cyl Four Wheel Drive Manual 127, 00 miles
Has a recently installed, newly rebuilt engine. It was running fine for about 6 weeks after install, then started idling high, and shutting off hard (dieseling. Would shake and sputter before shutting off). It does this intermittently. I don't believe there are any vacuum leaks, but don't know for sure how to check. What are the most likely causes?
Tuesday, October 12th, 2010 AT 10:35 AM