98 4.0 wont stay running help?
alright this thing gives me problems then runs like a dream, followed by more problems lol, so heres my current issue
oh ya its a 1998 grand cherokee 4x4 4.0 202,000 miles
new parts within 1500 miles
plugs, wires, cap, rotor, coil seafoamed
crank position sensor
throttle position sensor
coolant temp sensor on thermostat housing
new battery terminals
all grounds cleaned
downstream o2 sensor
fuel pump relay
couple new fuses
have also sprayed brake clean around carb cleaner and manifold to check for leaks, no leaks were found.
heres my issue it happened earlier today keep in mind with 106 degree temperatures
it started running really rough, I pulled over to get a bite to eat and went to start it and it would fire and immediately sputter out and die, I tried that a couple of times to no avail, waited about 20 minutes and it started up idling really bad again but I was able to drive it to my friends gym, it also died on the road 3 times within about 4 miles,
I worked out and went to leave and it would fire up, than immediately sputter out and die again, I looked around and found that my coolant temp sensor was cracked, so I unplugged it and the jeep started and idled fine for about 20 seconds before I shut it off, and went a bought a new coolant sensor, installed it and hooked everything up and it started up and idled good so I thought problem solved, wrong, it idles good for about 30-45 seconds and than the idle drops and it sputters out and dies...
it continued to do this and somehow I managed to drive it home, it did however die at every traffic light and once on the highway, it runs really rough and drives "jerky" sometimes is the best way I can describe it
I got it home and tried unplugging the maf sensor and it stayed running a little bit longer but still died, I let it run with the MAF unplugged than plugged it back in while it was running and it sputtered some but stayed running and than died a few seconds later... im stumped
I can hear the fuel pump priming as well, so it should be working fine, ill also say that this all started after I almost ran out of gas, made it to the gas station with 2 miles left till empty, I put in $20 of gas and it ran fine, than today its giving me all these problems... idk where to start.
There is also a check engine light, I was going to try and take it to autozone but im afraid it wont make it, I had friend take me to autozone to buy the coolant sensor
also getting really crappy gas mileage, 11 mpg with 31s and no lift with the 4.0
Last edited by jamesh23; 06-26-2012 at 09:41 PM.