Having problems with your 1998 Jeep Cherokee ?

1998 Jeep cherokee 4x4 4.0L turn's over will not start.

\015 My 98 cherokee four wheel 4L will not start. it will turn over all day long i just put a new starter on last month been running fine since saturday. but that was the last time. the fuel pump is working it is getting fuel to the rail. but no fire i removed one spark plug wire and held it close to the plug as we tried to crank it. But i could not see a spark. so i replaced the plugs,wires,cap and rotor.And after a big waist of time an hard earned money and 4mile round trip walk to and from the autozone she still will not crank! i do not have any access to engine diagnostic machine it is my only transportation right now. I dont know what else to do. \015 Posted / edited by AnonymousUser on : 15-07-2019

Answers :

Hi,

A workaround in lieu of a diagnostic machine is to check with the use of a DVM. Somec omponents that should be getting voltage on key to IGN and/or when cranking:
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  • ignition coil - one terminal goes to the IGN B+ and should measure constant 12VDC once the key is turned to ON/RUN, the other end goes to the power train control module, the voltage here must be pulsing when the engine is cranked/started/turned over. Here is a good generic instructional step by step;;
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  • if there is no IGN B+12 going into the coil, check the ASD relay;
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  • if both checks out, check/replace the crank position sensor mounted on the drivers side / top of the transmission housing. Look specially for loose/corroded terminals/connectors.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.
You need to connecth the car computer to a code reader. In return the code reader will give you error codes that tell you what is wron with the car.
If you have tested all the rest, it is probably a problem with the car computer control module.
Repair Help & Product Troubleshooting for 1998 Jeep Cherokee

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