I have a carbon build up on one bank of my 94 Land Cruiser (295,000mi0 cylinders.
The spark plugs from the three rear cylinder were covered with carbon. the first three were clean, its a straight six motor. I did a compression check and the three rear all had higher compression than the first three buy 10 to 15 psi.
A month or so my CE light came on with a bad O2 sensor, thus the reason for the carbon on the plugs. There is two O2 sensors one for each set of cylinders.
Is there a additive to get ride of the carbon or do I need to go to a shop and have the carbon removed? If a shop is needed, what brand of cleaner should I ask the shop what they use?
The spark plugs from the three rear cylinder were covered with carbon. the first three were clean, its a straight six motor. I did a compression check and the three rear all had higher compression than the first three buy 10 to 15 psi.
A month or so my CE light came on with a bad O2 sensor, thus the reason for the carbon on the plugs. There is two O2 sensors one for each set of cylinders.
Is there a additive to get ride of the carbon or do I need to go to a shop and have the carbon removed? If a shop is needed, what brand of cleaner should I ask the shop what they use?