I bought a 98 Passat 1.8T Auto. I know, I know, it's an auto... But it seemed like such a sweet deal, i couldn't pass it up.
It ran OK but it seemed like the turbo was shot. I never felt or heard the boost at all, just seemed under powered, but still ran fine.
One day, I change the oil and the air filter. My intake was completely clogged with leaves and debri. I also cleared all that junk out. Immediately thereafter, i let it warm up a few minutes and circulate the oil, then went for a drive.
Here is what i immediately notices:
If I slow down too rapidly or even at a normal rate, when i come to a stop, the car pops into neutral for a few seconds before kicking back into first. If i slow down to rapidly to make a turn, it will do the same thing, then pop into second. I think the problem may be when it downshifts more than 1 gear at a time, it seems to hesitate locking into gear.
Also, sometimes, if i accelarate too rapidly, the RPM's fly as though it is a manual, and the clutch is going out. This only happens occassionally. I know it sounds like a tranny issue, but the car ran great before the maintenance, only felt a little under powered.
I found a broken vacuum check valve, but after replacing it, these symptoms seem to be less severe but still occur and are very apparent.
I searched and searched for a leak in a vacuum line, but haven't found one. I don't know if it could be a speed sensor, or low on tranny fluid. Stupid tiptronic... It's a closed system, and i don't know how to check the oil. I've heard it's a difficult process.
Anyone got any advice???????
Thanks for looking, I appreciate the help.