Engine Performance problem
1988 Jeep YJ 4 cyl Four Wheel Drive Manual 165000 miles
I have a 1988 Wrangler 2.5 4 cylinder, When its first cranked up it will run perfectly for aprox 2 miles then the engine dies almost to a stop but always picks back up. This goes on while at mid throttle but not when the pedal is on the mat. I replaced the fuel filter, cleaned out the fuel return line and install a fuel pressure gauge. The gauge stays at 14psi even while the engine is shutting down. What can I look for? Thanks
The fuel pressure is perfect. I checked it. Have you checked for vacuum leaks and the catylatic converter. Also, has the check engine light come on?
Let me know.
February, 15, 2010 AT 7:57 AM
This year jeep has no check engine light or converter.
February, 15, 2010 AT 1:24 PM
I assure you it came with both. Is there a chance that someone has altered the vehicle? Also, did you find any vacuum leaks?
February, 15, 2010 AT 7:37 PM
No vacuum leak, no converter must have been taken off.
February, 15, 2010 AT 9:43 PM
WIthout the check engine, it becomes a guessing game. If vacuum is good and fuel pressure is good, I feel it deals with either a idle air control valve, throttle position sensor, or even the EGR. My other concern is the converter missing. The O2 sensor can't work properly without it. However, I assusme it ran good before the problem started. Have you checked the egr to see if it is carboned?