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: 150,439 (85,000–199,688)
Engines affected: 2.2L 4 Cylinder, 3.2L V6
19 people reported this problem
1997 Isuzu Rodeo - 3.2L V6 123,000 mi, Visitor
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!
1997 Isuzu Rodeo - 3.2L V6 158,015 mi, Visitor
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.
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
1997 Isuzu Rodeo - 3.2L V6 186,471 mi, Visitor
oil in spark plugs
1999 Isuzu Rodeo - 3.2L V6 179,110 mi, Visitor
I was checking the plugs & one of them was full of prestone
2001 Isuzu Rodeo - 3.2L V6
Spark plug tube failed, oil got in and caused misfire. Replaced tube and plug, back on the road next day.