Kjh.1994

I have an 05 Ford Mustang 4.0 V6 Auto. About 3 weeks ago I had head gasket replaced on drivers side and since then I have a misfire on cylinder 5 and that cylinder only has about 60 lbs of pressure it goes up and down sometimes it idles good and it starts idling rough again. What could be causing this? Did the mechanic do something wrong ? Please help

kenthicken

Have it towed to the mechanic who did the work. By rights, they should replace the part, either for free, or parts only, or a discount on labor. They are at least somewhat responsible here, if not totally.

Good luck.