I have a 1999 VW Beetle manual transmission. Less then 3 months ago had a new clutch put in and they said I also needed a new flywheel. So has both replaced and a new battery put in. I got it back and was running pretty good for a short time. Was having some trouble with it starting. Well within a few weeks it started what I call bogging down. Even with shifting it wouldn't really go. No get up and go! Before I knew it I was lucky to get to 5mph with the gas petal all the way down! So back to the same shop who did the clutch,flywheel, and battery. He said he replaced a sensor but still didnt change anything. it's been in the shop for a month and he says he has no clue. He did say maybe the timing and was going to check that. But it's still sitting there! Anyone have any idea what what it could be? Any idea's would be a start! Thanks!!