Having problems with your 2003 Jeep Grand Cherokee ?

The obd indicator light is on on my 2003 jeep grand cherokee and it is running rough. I have repaced the #3 injector per the cose adn it did not help. I then and replaced the spark plugs...it ran fine for a few weeks and now the light is on and it is running rough. strong fuel smell from exhaust any suggestions

Posted / edited by AnonymousUser on : 30-11-2020

Answers :

Check the fuel pressure first. At the right top of the engine you'll find a connector like for the tire ( a bit more in diameter) Connect this with a pressure tester. You need 48 to 52 PSI, if you read out much more or less, replace the fuel filter unit (located over the rear axle, tow lines at right side, one line at left side). Inside the fuel filter is the pressure regulator. If the pressure is ok, please read out the trouble codes. Without a code reader: switch the ign.key to on, wait till the bulb test is over, than switch off-on four times. The miles will change to a "P.." with four digits. Write down the codes till you read "done". If you read only "done" there are not TC's are stored. Come back after testing this
Repair Help & Product Troubleshooting for 2003 Jeep Grand Cherokee

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