GeneseeS4

It’s amazing how nice it is to have tight spark plugs, so smooth and tons of low end torque. Dealer has been maintaining my car up till now. Decided to do the 55,000 mile service myself which included changing the plugs. Rear cylinder had a lose plug, all kinds of soot and blow by on the plug and coil pack.

I wonder why it didn’t throw a fault code or anything, why I didn’t figure it out and what does the dealer mechanic do when servicing and testing your car besides cranking the air, reclining the seat and cranking the radio. I feel like an idiot.