The
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem. The
engine and the automatic transmission (transmission control is
only for automatics, engine is still computer controlled no matter
the transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM or ECM,ECU), which is very rarely the
problem. Other basic checks must be done as well such as mechanical
problems with the engine as well as engine state of tune and mileage
on the engine. The transmission can have mechanical issues as well
such as no gear engagement at all or a failed pump or other pressure
related problems. Also engine mechanical problems can and do cause
many drive-ability related problem such as rough idle and other
symptoms.
SOURCE: 2000 Jeep Cherokee will just die while driving down the road
Sounds like your factory alarm is having issuses. Did you take out the battery prior to this happening? Try resetting it. check trouble codes dont start the car only turn to positions on,off,on,off,on,off,on and then count the blinking engine light a longer pause means you've moved on to the next number, domit twice if you were unsure of your count then compare to your chilltons, but I bet it's the alarm
SOURCE: I have a 1993 jeep grand cherokee limited and this
Jeeps have a part called the crank sensor, when working properly it
senses the electrical feild produced by flywheel. This crank sensor
which is located on top of the tranny bell housing has been known to go
bad. When this crank sensor goes bad the CPU does not get a crank
reference and the computer will not fire the injectors. This crank
sensor will fail under high temps and if it is old will fail also when
cold.
You have to find out if the injectors are getting a pulse when the car does'nt start.
SOURCE: 2002 Jeep Wrangler 4.0 When Driving the Engine Dies
Put the key in the ignition and turn it on and off (3) times without starting the jeep, leaving it in the on position count the (1) flashing indicator Light, Eg: (5) flashes, Then there will be a pause, then it may flash (3) times, this is a code #53. Keep your Eye on them and write them down. If you should miss (1) Repeat as many times as needed, Info: A #55 means there are no codes!!
SOURCE: 2000 jeep wrangler - starts and then will die
this sounds like a fuel problem.try changing the fuel filter and check the fuel pressure to se if it falls within the manufactures specs.
Testimonial: "Will try this tomorrow. Thanks so much."
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