I'll try to be terse bc I don't want to read a huge block of text either...
For reference, here's my build thread: http://www.r3vlimited.com/board/showthread.php?t=381366
S54 swap running earlier this year. ECU swap/tune done by a local shop in Dallas. Finally get everything broken in and try to rev it to the sky but I hit redline at around 5000. I take it back and they reflash it as they forgot to enable/disable (whichever is correct) dyno mode. *1*
At that point, it would rev over 5000, but I can't remember for sure if I was able to take it to 8200 or not - I don't drive this car very often or very far, and I live in a crowded as hell part of DFW.
I drive for a while, but keep getting a VSS code popping up. I go back to the shop and have them reflash it - VSS code goes away but the guy I spoke with isn't quite sure how the guy doing the tuning did it. *2*
A month or 2 later I go and pay for some dyno runs, and the car absolutely will not go above ~5800; it seems just like its banging off a rev limiter. Tried with sport mode on, sport mode off, cleared adaptations, unplugged battery for a day then plugged back, etc, etc, etc.
Took it back to the shop today and they pulled the flash, looked over everything, and the dyno mode is set properly and the rev limit is set to 8200. They can't find anything wrong with the software.
*1*: any chance this is dyno mode somehow re-enabled? Some box not checked....or unchecked?
*2*: with OBD2 readers, the VSS still doesn't display a number. My guess is it was flashed out instead of coded to actually read the VSS off the E30 sensor as discussed in another thread in this section. Could this have anything to do with it?
IMO, there is no mechanical reason to have a consistent redline at 5800. The redline is controlled solely by the ECU.
The car runs strong, pulls hard...absolutely no codes at all. Definitely not in any kind of limp mode.
If the transmission was hosed, it wouldn't be a consistent redline at 5800 in every gear.
If the wiring was hosed, I think it would either be intermittently redlining at 5800 (ie a short), or have a variable rev limit.
Can anyone think of ANY reason besides purely the software that this would happen? If it is the software, or someone can look at/root through the software, I can/will send you my ECU, bc I can't get INPA to work on any of my 3 computers. I don't like not being able to fully enjoy the car so any ideas are much appreciated!
Or - does anyone in DFW (or Houston, since I will be there over xmas) have either an E46 M3, or an S54 E30 that I can swap my ECU into a see if it redlines at 5800 in a different car? That was it will at least point to either the ECU or my car.
For reference, here's my build thread: http://www.r3vlimited.com/board/showthread.php?t=381366
S54 swap running earlier this year. ECU swap/tune done by a local shop in Dallas. Finally get everything broken in and try to rev it to the sky but I hit redline at around 5000. I take it back and they reflash it as they forgot to enable/disable (whichever is correct) dyno mode. *1*
At that point, it would rev over 5000, but I can't remember for sure if I was able to take it to 8200 or not - I don't drive this car very often or very far, and I live in a crowded as hell part of DFW.
I drive for a while, but keep getting a VSS code popping up. I go back to the shop and have them reflash it - VSS code goes away but the guy I spoke with isn't quite sure how the guy doing the tuning did it. *2*
A month or 2 later I go and pay for some dyno runs, and the car absolutely will not go above ~5800; it seems just like its banging off a rev limiter. Tried with sport mode on, sport mode off, cleared adaptations, unplugged battery for a day then plugged back, etc, etc, etc.
Took it back to the shop today and they pulled the flash, looked over everything, and the dyno mode is set properly and the rev limit is set to 8200. They can't find anything wrong with the software.
*1*: any chance this is dyno mode somehow re-enabled? Some box not checked....or unchecked?
*2*: with OBD2 readers, the VSS still doesn't display a number. My guess is it was flashed out instead of coded to actually read the VSS off the E30 sensor as discussed in another thread in this section. Could this have anything to do with it?
IMO, there is no mechanical reason to have a consistent redline at 5800. The redline is controlled solely by the ECU.
The car runs strong, pulls hard...absolutely no codes at all. Definitely not in any kind of limp mode.
If the transmission was hosed, it wouldn't be a consistent redline at 5800 in every gear.
If the wiring was hosed, I think it would either be intermittently redlining at 5800 (ie a short), or have a variable rev limit.
Can anyone think of ANY reason besides purely the software that this would happen? If it is the software, or someone can look at/root through the software, I can/will send you my ECU, bc I can't get INPA to work on any of my 3 computers. I don't like not being able to fully enjoy the car so any ideas are much appreciated!
Or - does anyone in DFW (or Houston, since I will be there over xmas) have either an E46 M3, or an S54 E30 that I can swap my ECU into a see if it redlines at 5800 in a different car? That was it will at least point to either the ECU or my car.
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