Outlander560
NAXJA Forum User
- Location
- New York
Hey guys I have a 96 xj I6 5spd with 176,660 miles on it
I've done some searching but would like to see if you guys have tried any other techniques to remove carbon from your engine . Recently I experienced a misfire on cyl 1 and a random misfire i pulled the plug and noticed ground strap on the plug was pushed up into the electrode on the spark plug it didn't break anything and it did not have a knock, so I was thinking probably an excess of carbon build up on the piston head. Either way I did some other tests just for the miles on the vehicle I ran a compression and a leak down. At TDC I had 25% leakage on cyl 1 and 27% leakage on cyl 6 and I can hear air coming from the tail pipe so I'm thinking the carbon is built up around the exhaust valve seat causing the leakage. I got the shop borescope and looked inside the cylinders and they were loaded with carbon. I ran a motovac through the fuel system idling for 30 minutes while revving it up every 5 minutes holding at 2000rpms to help remove the carbon. I thought the motovac's detergent might help out and on a test drive the vehicle ran better. I brought it back into the shop and pulled the plugs nothing bent or broken but still the cylinders were loaded up with carbon. Aside from removing the head do any of you
guys have experience with Seafoam? or GM cylinder head cleaner? Or any other carbon cleaners. I appreciate the info!
I've done some searching but would like to see if you guys have tried any other techniques to remove carbon from your engine . Recently I experienced a misfire on cyl 1 and a random misfire i pulled the plug and noticed ground strap on the plug was pushed up into the electrode on the spark plug it didn't break anything and it did not have a knock, so I was thinking probably an excess of carbon build up on the piston head. Either way I did some other tests just for the miles on the vehicle I ran a compression and a leak down. At TDC I had 25% leakage on cyl 1 and 27% leakage on cyl 6 and I can hear air coming from the tail pipe so I'm thinking the carbon is built up around the exhaust valve seat causing the leakage. I got the shop borescope and looked inside the cylinders and they were loaded with carbon. I ran a motovac through the fuel system idling for 30 minutes while revving it up every 5 minutes holding at 2000rpms to help remove the carbon. I thought the motovac's detergent might help out and on a test drive the vehicle ran better. I brought it back into the shop and pulled the plugs nothing bent or broken but still the cylinders were loaded up with carbon. Aside from removing the head do any of you
