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Jeeps And More
08-28-2005, 12:03 AM
I have a 1993 zj with the 5.2 it has recently developed a problem of stalling in all operating conditions. this seems to occur more often with the a/c engaged but i beleve that it has to do with the extra load.
you will be driving and the jeep will suddenly misfire then it will run and then it will die theh tac always bounces quickly between zero and whatever the rpm was.

there are no codes and it passes all functional tests in the snap on diagnostic tool.

replaced TPS, Crank Sensor, Fuel Pump, Coil. it also had a recent tune up.

I nor anyone at my buddy's shop can seem to diagnose the problem.

Thanks in advance

Will

2jeepsforus
10-27-2005, 07:15 PM
Check that your Catalytic converter isn't plug, that will cause your rig to run like garbage. Sounds like you could have too much back pressure, basically its choking you motor, because it can't push out the excess exhaust gases.

Just a thought, but its worth a shot.

Dave

OverkillZJ
10-27-2005, 07:34 PM
IAC stepper motor.

jsteves
10-31-2005, 04:42 PM
map sensor or poor connection at the map sensor