TPS spikes and misfires over 4k rpm and boost
 

Hi there,

I installed Reverant's enchanced MS2 a week ago and I have trouble running boost over 4k rpm.

I noticed I have spiky TPS reading, but I have no idea how to deal with it. The car stumbles randomly over 4k RPM - the tach acts crazy too. This happens almost every time after WOT.

I'm attaching log screen so you can see for yourself.

Post MSQ and log file.

It looks like you are going WAY to rich in boost. It might just be dumping too much fuel and causing a stumble.

It also looks like it is showing some kind of decel based on the TPSacc. Is your TPS variable and calibrated correctly? At the same time the TPSacc shows a drastic drop, your dutycycle falls.

I'm uploading msq and 2 logs. I guess there is some noise on the TPS - maybe because most of the grounds are hooked up to throttle body.

Unfortunately I can't upload any logs because even ziped are over 1 mb. Here is the MSQ.

Can you send the datalog to my email?

I just sent you the datalogs.

I can only see one sync loss, which is while idling (I presume from performing a burn).

At the exact moment you posted, you were going full rich (less than 11.0, as low as 10.3), and your coils can't handle that rich of a mixture, resulting in misfires.

Your tacho is bouncing because its driven by your coils on your 94 - multiple misfires will result in the needle bouncing around.

So if I go leaner on boost say 11.5 - 12.0 it should help?

I'm running COPs btw.

Aim for 11.5-11.6 in boost.

Btw even LSx coils will misfire at ~10.2.

your TPS signal is very noisey still and triggering AE events.