Have Jeep Questions? Ask a Jeep Repair Expert for Answers
Hello and welcome! Thank you for requesting me! Can I start by getting your VIN?
Thank you for the VIN! I would have your mechanic check engine vacuum. It is possible you have a sticky valve or a engine breathing issue causing the engine to misfire. The engine vacuum should have a solid 19 to 22 inches of vacuum. The vacuum gauge or needle should not fluctuate at all with the engine at idle. If so, this indicates a mechanical issue with the engine.
Also, check the camshaft position sensor and crankshaft position sensor. Check for a broken flex plate, loose or jumped timing chain, broken timing chain guides, cabroned up valves, chekc fuel pressure and plugged exhaust.