Our van has been doing this slight bucking while driving it's not severe and hasn't thrown and engine light. Plugs are new oem plugs. Misfire counter shows a few misfires on cylinders 2, 3, 5.
Usually less than 10 each time we drive. At idle it kind of feels rough intermittently as well. Gas mileage is about 18 and 1/2 fuel trims look good plus or minus 3. The van has 107,000 miles on it we bought it at 104,000.
Compression test was done by me this morning. Fuel and spark disabled all plugs removed engine was cold.
Readings were as follows.
Cyl 1 142
Cyl 2 148
Cyl 3 130
Cyl 4 132
Cyl 5 135
Cyl 6 138