Question about 1997 Jeep Grand Cherokee
VEHICLE STARTS IN COLD WEATHER , RUNS FOR A SHORT TIME....THEN STALLS. RESTART TAKES A WHILE AND OFTEN REQUIRES PUMPING THE ACCELERATOR AND GRADUALLY THE VEHICLE WILL START. I SUSPECT A FUEL PUMP SCREEN IS PLUGGED(IN TANK) OR A WEAKENING FUEL PUMP ITSELF.
Check fuel pressure at the motor--with a gauge
Check fuel pump volume
Check Current --anywhere in system you choose
Pumping the pedal only works the TPS Sensor,
nothing to do with the pump for the most part
Back probe the TPS & check voltages
I prefer a scope-- but a volt meter is better than nothing
I think the pump check valve is gone, so turn the KO/EO
then turn Key off & see if press holds on gauge
Is the filter more than 5 years old?
Posted on Dec 08, 2012
Testimonial: "GIVES ME MUCH MORE DIRECTION AS TO NARROWING COMPONENT DIAGNOSIS"
A lot of the problems are the PCM there is a 5 v regulator system in them and the solider joints crack or the three wire harnest that go to the pcm ware out after a while start the jeep and wiggle the three harness that go to the pcm one should make it stall usually the middle one but I've seen any of the three cause this problem quick check and no money involved trust me I've seen 4 or 5 cases and this was the fix.
Posted on May 03, 2013
Yes it seem to be your Gas filter.also check your Tps sensor
Posted on Dec 08, 2012
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Posted on Jan 02, 2017
car_parts.com can probably get you the part. I would be more suspicious of the Crankshaft position sensor. In my experience, PCM on chrysler vehicles are very reliable with good self protection devices. (not that the never go bad) In 23 years of working on vehcles I may have replaced 3 or 4 on the Jeep/chrysler. 90% of the cases I have worked on with your symptoms ended up with a crankshaft position sensor. If the check engine light does not go out while the engine is cranking then you probably have no crank signal. It is located on the left side of the bell housing near the rear of the engine block. Will have two 10mm bolts holding it in place. New one will come with a piece of felt or paper stuck to end of it. This is for spacing purposes. Hold it in against flexplate and tighten bolts. Paper will come off when engine is turned over. Done
Posted on Sep 15, 2009
how are the spark plugs?
would start with those.
the fuel filter is usually located under the hood by the intake manifold and attached to the firewall of the car. the pump is located right by the fuel tank and if you cant see it then its inside the fuel tank. (you will have to lower the fuel tank down to get to the pump.)
Posted on Aug 14, 2009
SOURCE: 2000 Jeep Grand cherokee Laredo
sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered
Posted on Sep 27, 2009
If you put the thermostat in correctly (spring towards the engine) that should be OK. Likely if the water pump wasn't leaking or had a bad bearing, you wasted your $ on that.
If you re-filled it and did not have the heater on high heat, you may have some trapped air in there. But, still overheating says another thing. If you have a blown head gasket, it can pump compression into the cooling system and drive the coolant from the core. It will also overheat. You can have that tested at most any decent shop that will do a hydrocarbon test to find that.I think someone makes a chemical test kit for that but not sure if it's very expensive or not. White smoke from tailpipe will also be an indicator as will be any coolant in the engine oil or coolant on one or more spark plugs. If it turns out that it has a head gasket problem don't stop looking for problems as often a faulty fan or obstructed radiator can cause the initial overheat that caused the gasket to fail.
Posted on Jan 16, 2010
Testimonial: "Thank you. I was hoping not to hear head gasket, but that's where it seems to be leaning towards."
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