Hello. I have a stock 90 xj 4.0 I6 and i hit a good size pothole in the road. right after i hit it, my engine died and i could smell the scent of burning plastic. i pulled over and imediately popped my hood to check the wiring. i noticed what looked like arcing marks underneath the hood. The ground strap on the firewall and the ground from the - battery post to chassis burnt completely off. after i looked at it a little bit longer and confirmed that the battery clamp had grounded out on the hood. i replaced the battery ground to chassis and the block to firewall and it started. while in park, the idle would surge from 4-500 rpm to 6-700 then stabilize. and the pattern would continue every 10-15 seconds. when i shift to drive, under load, the idle surged even more from almost stalling to 800 rpm. it will run fine as long as i accellerate but when i brake, it will surge exremely bad and almost stall.
so...what could be the problem? any ideas or thoughts are welcome. besides the two ground points burning off completely, i dont see or smell any other possible burnt wires or components. The exhaust also smells more like unburnt gas and smokes a little on takeoff from a red light. everything else electrical wise is working fine
so...what could be the problem? any ideas or thoughts are welcome. besides the two ground points burning off completely, i dont see or smell any other possible burnt wires or components. The exhaust also smells more like unburnt gas and smokes a little on takeoff from a red light. everything else electrical wise is working fine