RomRaider

Hi,

I posted some time ago my learning view results with an IAM of 8. Since then I've reset the ECU and installed an APS 3" TBE with a high-flow cat. After I got the car back I pulled some learning view logs and found everything was 0 and IAM of 16. I've put maybe 600 miles or so on the car since then and I'm getting an odd "bogging" sensation that I've been getting for years now if I accelerate hard and the RPM climbs to around 4K... I BELIEVE it may have something to do with my up pipe which is slated to be replaced with a catless TurboXS unit ASAP. However, I just pulled my learning view log and found this:



Any thoughts at what I might be looking at here as my IAM is now 13 instead of 16? I know I have the 2 CEL's one is because of the high flow APS cat (the efficiency one) and I was told I had to wrap the exhaust to make sure the hot gas got to the cat etc... The other is Front O2 Sensor Short Circuit. I believe I need a front O2 sensor in the manifold. Would this be causing the issue? Though that O2 sensor only just recently started throwing CELs, (I think it was damaged in the TBE install but not sure).

Any help would be appreciated!

Thanks!

Did you get retuned when you had the TBE installed?
If not, that's the problem.

No.. Car is otherwise stock and on stock ecu map.

Can openecu/romraider be used in this sort of situation? I will have to pull a base log and see if someone can help.. Thanks!

Notice that IAM has dropped from its usual value of 16. Your motor is knocking, and the ECU doesn't know that the car has been modded, so it assumes that all the knock was caused by running crap fuel, so it reduces IAM to cut timing across the board.

Notice also that the ECU is experimenting with increased timing - see the positive numbers in the knock learning table? The ECU is hoping that there's good fuel in the tank now. But this isn't a fuel problem, it's a tuning problem. The ECU will advance timing until detonation occurs again. It will then subtract timing, but only temporarily... it will continue trying to run more timing periodically, so it will continue knocking periodically until the ECU is retuned for the car's new exhaust.

Yes, RomRaider can be used to help with this. Check the "base maps" forum and see if there's a tune that's suitable for your mods. If there is, you can try it. Then do some logging to verify that it is in fact safe - or to guide some adjustments to fine-tune the base map for your particular car. If there is no suitable base map, you can probably find someone to provide you with a custom tune. If you're lucky you might find a volunteer, but more likely you'll have to pay a tuner a couple hundred bucks for the service.