AWDTalonDE
15+ Year Contributor
- 126
- 0
- Nov 25, 2004
-
Columbia,
Maryland
I recently purchased a 1990 AWD TSI 
and am already loving it's stock performance. I bought the Haynes Repair Manual and started reading many forums and FAQ's on DSMs. The only modifications I have done was doing the free mods (removing the fog lights, taking out the honeycomb silencer, etc.) and putting in a new intake filter.
A couple days ago me and my friend built a homemade MBC and tried to get it to work but it caused some problems. Mainly my car would experience a strange occurence once it hit above about 3500 RPM and/or 10psi. The RPMs would suddenly jump very high and go fast while doing so and when I would try to shift it would simply stay there. An example would be when I was in 2nd i hit 3600 rpm and it jumped to 5500 very quick and when I shift to 3rd it would just keep going higher instead of going down a bit. We are going to put back the stock controller today as I don't want to experience any more problems.
My main questions are what do you think I should do about this? I'm going to get a major tune-up soon and still have to change my oil and filter. The car also suffers from very poor gas mileage(around 13 miles to the gallon.) My exhaust and cat probably aren't working as there is a rattling in the cat when im stopped(guessing a hole in it.)
If I were to get all the maintance done and the problems fixed what type of new exhaust do you think I should get? I know I want a turbo-back exhaust and run a straight pipe as I had just passed inspection a week ago. Also, do you think it would be worth it to just get an electronic boost controller and just forget the MBC idea?
Any help would be appreciated as this is my first real car. My others featured a 89 cavalier and a 92 dodge shadow which both had about 120hp...combined. :thumbdown
and am already loving it's stock performance. I bought the Haynes Repair Manual and started reading many forums and FAQ's on DSMs. The only modifications I have done was doing the free mods (removing the fog lights, taking out the honeycomb silencer, etc.) and putting in a new intake filter. A couple days ago me and my friend built a homemade MBC and tried to get it to work but it caused some problems. Mainly my car would experience a strange occurence once it hit above about 3500 RPM and/or 10psi. The RPMs would suddenly jump very high and go fast while doing so and when I would try to shift it would simply stay there. An example would be when I was in 2nd i hit 3600 rpm and it jumped to 5500 very quick and when I shift to 3rd it would just keep going higher instead of going down a bit. We are going to put back the stock controller today as I don't want to experience any more problems.
My main questions are what do you think I should do about this? I'm going to get a major tune-up soon and still have to change my oil and filter. The car also suffers from very poor gas mileage(around 13 miles to the gallon.) My exhaust and cat probably aren't working as there is a rattling in the cat when im stopped(guessing a hole in it.)
If I were to get all the maintance done and the problems fixed what type of new exhaust do you think I should get? I know I want a turbo-back exhaust and run a straight pipe as I had just passed inspection a week ago. Also, do you think it would be worth it to just get an electronic boost controller and just forget the MBC idea?
Any help would be appreciated as this is my first real car. My others featured a 89 cavalier and a 92 dodge shadow which both had about 120hp...combined. :thumbdown
