So I brought it in with two problems this distributor cap wasn’t sitting right and there was a vacuum hose leak. He said he checked the timing and everything was good and the problem wasn’t from a vacuum leak. Starts going through the truck tells me my cat is plugged and he’s going to replace it and put an exhaust pipe on. Well it was a vacuum leak that was causing the problem and he never actually looked at the distributor cap just the timing on the piston. So when I left the shop it could hardly drive down the road till I adjusted the cap till the engine stopped back firing. I really don’t know how he left the truck leave when it was running like that telling me it was good. Then to bring up the cat and exhaust pipe he just took it off he never put a new one on so now my truck sounds louder then ever and he told me it was bcuz it was a smaller cat on the truck.