Having problems with your 2002 Jeep Grand Cherokee ?

The engine has no compression,when try to start the engine it turn slowely and backfire.battery ok, stater ok.(jeep grandcherokee 2002 year, engine 6 cylinder.)

Posted / edited by AnonymousUser on : 19-02-2018

Answers :

Hello osmanmackoy; My name is Roger and I will help you. First have you done a compression test? If so the compression must be over 100 psi. in order for the cylinder to fire. This would be a bare minimum. I would also look at the oil pump drive unit. This would be located where the distributor would have been on the older engines. There is a sensor mounted on the top of the drive. Remove the sensor and check the inner shaft. There should be no side to side play in the shaft.If the shaft moves side to side You need to replace it. This sensor is used by the computer to tell what cylinder to fire. The computer will not know which cylinder is next to fire. This will cause a no start or backfire condition.
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Repair Help & Product Troubleshooting for 2002 Jeep Grand Cherokee

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