I will start at the beginning:
My Jeep is an 05 LJ Rubicon 6 speed. Daily driver when I cannot ride the bike. About two weeks ago I noticed a very small coolant leak and discovered a slight crack in the top radiator tank under the fan belt routing sticker. No problem, replaced the radiator, hoses and cap then flushed and filled the system. The system was "burped" and functions properly, temps run slightly lower than before I did the work (slightly below 210 as opposed to right on 210). I doubt this has anything to do with my current problem but included this just in case.
My current problem:
Friday evening on the way home from work the engine seemed to be losing power then all gauges quit working and the engine died about a mile from the house. It would start and run for a bit and/or die immediately. I googled the symptoms and got crank position sensor, called the dealer and they agreed. So I got the wife to pick me up and got a CPS from the dealer before they closed. I then installed the sensor, while plugging the harness back up the red slide lock on the plug broke (it was very brittle) but the plug seemed to be locked in place with the tab style lock. Check engine light was gone (unhooked battery) and the jeep seemed to run smoother than it had in a long time, life was good.
Saturday morning on the way to work it ran fine for 5 miles then the problem resurfaced. Remembering that the lock broke I checked the plug, it seemed to be loose so I wiggled it and the jeep fired right up. On the way home I had the same problem X10, died many times after warm, the problem seems to be worse at higher rpms.
I pulled the codes this time and got:
P0300 - multiple cylinder misfire
P0335 - CPS "A" Circuit malfunction
u0155 - Lost communication with cluster ccn
I figured the plug was probably loose and not making a good connection since the slide lock broke so I went to advanced auto and got the plug. Installed the plug today, the wires were soldered and I used the waterproof heat shrink that I use on my boat. Same issue except the P0300 code didn't come back.
The jeep runs fine until it reaches operating temp, in fact it seems to have more power and run smoother than before....until it warms up.
Any help or guidance is greatly appreciated.
My Jeep is an 05 LJ Rubicon 6 speed. Daily driver when I cannot ride the bike. About two weeks ago I noticed a very small coolant leak and discovered a slight crack in the top radiator tank under the fan belt routing sticker. No problem, replaced the radiator, hoses and cap then flushed and filled the system. The system was "burped" and functions properly, temps run slightly lower than before I did the work (slightly below 210 as opposed to right on 210). I doubt this has anything to do with my current problem but included this just in case.
My current problem:
Friday evening on the way home from work the engine seemed to be losing power then all gauges quit working and the engine died about a mile from the house. It would start and run for a bit and/or die immediately. I googled the symptoms and got crank position sensor, called the dealer and they agreed. So I got the wife to pick me up and got a CPS from the dealer before they closed. I then installed the sensor, while plugging the harness back up the red slide lock on the plug broke (it was very brittle) but the plug seemed to be locked in place with the tab style lock. Check engine light was gone (unhooked battery) and the jeep seemed to run smoother than it had in a long time, life was good.
Saturday morning on the way to work it ran fine for 5 miles then the problem resurfaced. Remembering that the lock broke I checked the plug, it seemed to be loose so I wiggled it and the jeep fired right up. On the way home I had the same problem X10, died many times after warm, the problem seems to be worse at higher rpms.
I pulled the codes this time and got:
P0300 - multiple cylinder misfire
P0335 - CPS "A" Circuit malfunction
u0155 - Lost communication with cluster ccn
I figured the plug was probably loose and not making a good connection since the slide lock broke so I went to advanced auto and got the plug. Installed the plug today, the wires were soldered and I used the waterproof heat shrink that I use on my boat. Same issue except the P0300 code didn't come back.
The jeep runs fine until it reaches operating temp, in fact it seems to have more power and run smoother than before....until it warms up.
Any help or guidance is greatly appreciated.
