A Sharp
Proven Member
- 158
- 13
- Nov 18, 2013
-
Platteville,
Wisconsin
Hey,
My 2g Talon TSI has been having issues at low RPM ever since I bought it. It idles at around 1,200 RPM and hesitates really badly right around 2,300 RPM under load. These problems are even more pronounced when the car is cold. When I first start the car on a cold day, it will idle as high as 2,700 RPM. The hesitation is much worse when it is cold as well. I even remember one occasion where the car was cold and it misfired like crazy under load at 2,300 RPM.
However, the engine runs just fine past 3,000 RPM.
Things I have tried:
A full throttle body rebuild, including a new BISS.
Tightening all IC pipe connections.
Installing properly gapped NGK copper spark plugs.
Some boost leak testing with a bike pump (ghetto as hell, but I don't have a compressor).
At this point I feel like there aren't any boost leaks big enough to cause problems of this magnitude. I suspect that maybe the MAS is dirty. Also the car's throttle response is very jerky when cruising around in first gear. When I initially step on the gas it jerks, kinda like it instantaneously goes from 0% throttle to about 5% throttle. This makes me suspect that I have a problem with the TPS.
The car is pretty much stock as far as the engine goes. I replaced the T25 with a 14b from a 1g (still running stock boost, tune, and IC piping) and the guy that had it before me did an EGR delete, but that's about it.
Any suggestions would be great! Sorry that I don't have a data logger or wideband to provide additional info, but this is my daily driver and I'm just looking to make it a solid runner.
Thanks!
My 2g Talon TSI has been having issues at low RPM ever since I bought it. It idles at around 1,200 RPM and hesitates really badly right around 2,300 RPM under load. These problems are even more pronounced when the car is cold. When I first start the car on a cold day, it will idle as high as 2,700 RPM. The hesitation is much worse when it is cold as well. I even remember one occasion where the car was cold and it misfired like crazy under load at 2,300 RPM.
However, the engine runs just fine past 3,000 RPM.
Things I have tried:
A full throttle body rebuild, including a new BISS.
Tightening all IC pipe connections.
Installing properly gapped NGK copper spark plugs.
Some boost leak testing with a bike pump (ghetto as hell, but I don't have a compressor).
At this point I feel like there aren't any boost leaks big enough to cause problems of this magnitude. I suspect that maybe the MAS is dirty. Also the car's throttle response is very jerky when cruising around in first gear. When I initially step on the gas it jerks, kinda like it instantaneously goes from 0% throttle to about 5% throttle. This makes me suspect that I have a problem with the TPS.
The car is pretty much stock as far as the engine goes. I replaced the T25 with a 14b from a 1g (still running stock boost, tune, and IC piping) and the guy that had it before me did an EGR delete, but that's about it.
Any suggestions would be great! Sorry that I don't have a data logger or wideband to provide additional info, but this is my daily driver and I'm just looking to make it a solid runner.
Thanks!