On the V-6 engine, oil in the spark plug tubes can cause a misfire. Resealing the tubes as part of replacement of the valve cover gasket and replacing the spark plug wires will commonly repair this issue. On newer models the misfire can result in illumination of the Check Engine Light.
Oil in Spark Plug Tubes May Cause Misfire on Isuzu Rodeo
Average mileage: 151,097 (85,000–199,688)
Engines affected: 2.2L 4 Cylinder, 2.6L 4 Cylinder, 3.2L V6
22 people reported this problem
Viewing 1 - 7 of 7 problem details
Oil leaked into spark plug holes and shorted out the coil wires and cause a misfire in the right bank. This also caused the cat's to go bad and the 02 sensors had to be replaced!
My check engine light came on, so i took it to Auto Zone. They ran a diagnostic and said it was the 6th cylinder misfire. So my husband and father in law took the spark plug out and there was oil on it.
oil in spark plugs
started skipping, then check engine light came on. Had advance auto run computer on it and the reading said it was a misfire in the cylinder 6
Check engine light illuminated. Code P0305, misfire on cylinder 5 detected. Check engine light cleared at next start up. No noticeable performance issues.
I was checking the plugs & one of them was full of prestone
Spark plug tube failed, oil got in and caused misfire. Replaced tube and plug, back on the road next day.