Hey guys! my 2002 is having some issues. Does that shaking thing for about 15-30 seconds then it stops. I had a multiple engine misfire code p301 down stream 02 sensor was changed about a year ago, just changed the upstream 02 sensor today. Drove it around the block and no more issues. On my way to work I could feel a slight stumble or hesitation when I was giving it more gas. Then the check engine light came back on. Drove the next 20 miles with zero issues and the mpg gauge was around 45-50 the whole time. Things I haven’t changed: -coil packs -fuel injectors -PCV valve Does the 1st gen have an EGR to clean? I have no coolant on the spark plugs or coolant consumption. My oil is not “milky”
Can you clarify the code(s)? Random/multiple cylinder is P0300. P0301 to P0304 are for cylinders 1-4. Have you cleaned the MAF and the throttle body?
