I can drive my Jeep from rest area to rest area and when it's hot outside if I go to trun off the engine it doesn't want to start right up. I can let it sit for awhile and then it will start. If I let it run then it's OK. It never over heats. This happened a couple years ago when going through Kansas when it was 103-107 degrees. Also it happened this year in Missouri when it was in the upper 80's.
Since this is an older vehicle it is subject to a condition known as vapor lock,,sometimes when traveling in hot climates pulling a trailer, you need to open the hood slightly for all that built up heat to disipate because heat rises..if the hood is kept closed it wont escape letting the engine cool down is a good idea anyway when pulling the trailer..(but only when parked) cheaper fuels will "vapor off " when extremely hot and cause this condition..so if its not an inconvienience youn either take the break and wait it out or dont shut the vehicle off but slightly open the hood and let that heat out..
Solenoid is probably overheating, or positive lead to starter is loose, if so, tighten it. You may want to replace starter.
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SOURCE: 1997 Jeep Grand Cherokee cranks but won't start
Same thing happened to me at about 140k. It was the fuel pump. Best way to test if your pump is failing and loosing pressure is to see if the car will start immediately after it has been running, or turn the key to the alt position for a few minutes before starting. If your engine fires faster after it has been running or the key has been in the alt position you will probably need a new fuel pump. Great news is with a very deep socket to get the tank straps off its a 30 minute job to replace the pump/filter assembly.
SOURCE: 95 jeep grand cherokee, hard starting, backfires, when cold
get a couple bottles of gas line antifreeze .. if you don't already use it and add it to the gas.
Robert
P.S. in minus 40 i don't even get out of bed... minus 23 here last nite... isn't winter grand
SOURCE: 90 jeep starting problem
Check the crank position sensor. I had the same problem in a 1989 cherokee 4.0, and the solution was simply to acomodate the sensor wiring. No replace was necesary
SOURCE: hard starting jeep grand cherokee 2001 4.7 V8. new
who installed the CSM, sounds like it was installed incorrectly?
Also, are your battery connections tight?
SOURCE: 2001 jeep grand cherokee code 56???
hi
your blend doors are damaged or broken, go to heatertreater.net they have a quick fix blend door repair kit that you can install yourself in around half an hour, this really works as i have fitted a few myself. jeep will quote you around £800 to fix.
hope this helps
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I remember this being an issue when I was a kid and the family would take trips in our 59 ford wagon, pulling a fishing boat loaded with camping gear or our box trailer and the same boat on the roof upside down..it was funny to see the car out on the road loaded like that...good mluck..
Your comment just made me put my thinking cap on. When I was younger I restored a 1946 Ford Pickup and I would be driving along during the summer and all of a sudden I would be on the side of the road. It was a vapor lock in the fuel line or fuel pump. Bring back old memories.
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