Sometimes after shutting the vehicle off if i try to start it say after 30 minutes it is hard to start you have to crank and crank then it will finally start you have to give it alot of gas after it starts it doesn't do it all the time
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Re: trouble startng 98 jeep
Sounds like a fuel problem. Could also be plugs fouled out. Try running some injector cleaner though it, or even hooking up a trouble shooting tester on it. I invested in one for my vehicle. They don't cost too much. It really sounds like fuel is not getting through the injectors.
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Install a new crank shaft sensor. I had the same problem with my wife's Jeep. It would run fine fore days at a time then quit. When the crank sensor goes out their is no spark or injection of fuel into the engine. This is a Hall Sensor. They can be intermittent, and affected bu heat. If your Jeep will not start, try freeing the sensor and see if it starts. Cold Freeze is used in electronics to test
I just fixed my '95 Grand Cherokee after a few years of dealing with this very common stall issue. It is the Crank Positioning Sensor. I had put a new one in without any change. I tried another one without change. Discovered Jeeps DO NOT like aftermarket sensors. I bought a new one from the dealer and haven't had any problems.
The first thing to check is the fuelpump preasure, make sure the compressor is pumping enough preasure, these are famous for fuel pumps going bad.try sparying starting fluid into throtle and see if it starts, this will tell you its a fuel problem.
Likely your fuel pump has failed or the filter is extremely dirty...Do a pressure test before replacing...pump is about $200. other problem could be from broken or disconnected vacuum line , bad control or bad vacuum servo motor for a blend door for the heater/.A/C.
might check the crank sensor. it is located on the transmission bellhousing on top just off to the drivers side. if the pcm loses this signal the vehicle will die immediately and not restart until it sees the signal again
when a cherokee have trouble starting i always go to the crank sensor first it on top of trasmission you crank the motor on the fly wheel you have accumulation of rust and before the crank sensor notice the engine turning it take a long time me i remove the crank sen sor visualy check if it crank i change it and i used some abrasiv sand paper or something like that i ask somebody to crank the engine i put the sand paper in the hole of crank sensor when the engine turn sand paper clean the flyweel be carefull for our finger after install the sensor and try it out good luck pierre