misfire

07 wrangler jk 3.8l it all started with a p0301 code, misfire cylinder one so I replaced the spark plug for cylinder one then I got a P0303 code so I replaced all of the spark plugs and all of the spark plug wires. The code then changed to a P0300 misfire in random cylinders. so I replaced the...

So my 07 2 door jk 3.8.....it started with a p0301 misfire in cylinder 1, so I changed cylinder 1 spark plug. then it through p0303 misfire in cylinder 3, so I changed all of the spark plugs and the plug wires. then it through just a p0300 misfire in random cylinders. the Jeep runs fine, no...

2000 Jeep Cherokee Sport 4.0 Check engine light on shows codes Po202 and Po204. Misfires and shutters mainly when put in reverse and gas given to back up also strong exhaust smell. Also runs worse when warmed up after driving awhile. This is a recurrent issue. Put in 2 new fuel injectors (2 &...

We have a 1995 YJ 4 cylinder. It cuts out at high (3800-4000) rpm. We've replace fuel filter, coil, rotor, wires, and plugs as well as the throttle position sensor. I've heard that it could be the crank sensor and fear we may be floating tired valve springs. Any ideas would be appreciated.

Hey all. Was hoping one of you could point me in the right direction with what part to order... Bracket and wires from center bottom of Jeep. Wires run from the cat to the o2 sensor. Looking up parts right now and I would assume that I need to replace my o2 sensor "upstream?" Please ask...