MIS Fire cyl #3 P0301

[skeeter1433]

Having an issue with my 2002 3.7. Started out the other day with the CEL flashing and pulling out of street engine was missing real bad . Came back shut it off for an hour and tried again and it ran fine but the CEL is on (not flashing) but still shows p0301. any suggestions?

 

[tjkj2002]

P0301 is misfire cylinder #1,not #3 as that would be P0303.

 

[skeeter1433]

My bad but the same question is still out there

 

[Dave]

If it were me I would just delete the code and see if it (MIL & code) comes back. (and keep my fingers crossed....) See what happens.

Dave

 

[ThunderbirdJunkie]

When was the last time you changed your spark plugs?

 

[AlexGeorgiou]

Check your spark plugs. If they appear yellowish at the bottom they need to be replaced. It's a good idea to replace the wires as well.

 

[rainjer]

I fought this problem for over a year. I tried everything including a visit to the dealer with no luck. It ended up being a battery problem. It battery was not putting out enough power for the computer on start-up and would cause it to misfire. One day I my battery finally died and I replace it and it went away.

Jeremy

 

[Boomerang]

A few months ago i got a random misfire code. Seemed fine to me, cleared it and put it new plugs later. Got another random misfire, examined th eplugs, a couple were fouled. replaced. A week later thre out a Misfire on #3 code.
Took it to a repair shop, theres an old service bulleting for cylinder 3 producing excess carbon and then the vavles stop operating properly. Jeep was running rough at this point when at idle and warm.
Tech says 3 codes, random misfire, #3 and # (2 or 4, can't remember) misfiring. They say the valves on multiple cylinders are not working and need to do a tear down and rebuild. total cost is about $3000. This Liberty (3.7) has 47k miles on it.