[Flatrater]

Turbo

First of all these mobile mechanics are hacks, they come take your oney and are gone.

The car had no miss before his attempt of a tune-up and now has a miss. Kinda easy to figure out what is wrong.

A miss under load is usually an ignition miss. Take off the wire at the coil and start the car up, if you have spark the coil is fine. Next remove the wire from the plug, get the boot close to the engine and start it up. If you see spark the wire is fine. That would then leave the spark plugs. Is it possible he put junk plugs on the car?