I have installed a diy turbo setup on my 1.6l mx5.

The car is running well and I am in the process of tuning things.

I've noticed in the logs that under a WOT run through the rpm range, the injector PW will jump up or down by approximately 1ms (say from 12.5ms to 13.5ms). The Gve remains relatively smooth which I understand is the value taken from the fuel VE table?

I have also noted that the bit7 and bit8 indicators are activated when this happens.

From researching the forums it seems that bit7 indicates MAPdot accel enrichment. I'm a bit confused though because:

1) the MAP is pretty constant
2) the Accel indicator isn't lighting (at all)
3) this is happening above 5000rpm which is my high RPM threshold

Could it be that I am incorrect in associating bit7 (and bit8?) with AE?

Is there anything else that I need to consider that could be causing the abrupt changes in PW?

my AE settings are
Low/High thresholds 2500/5000
MAPdot threshold 120
0% TPS driven

 

Yes, bit 7 and 8 indicate MAP based AE (accel and decel respectively).

Have you checked gEGO?

 

doh, just noticed that I was viewing TPSdot in my log not MAPdot, under WOT the MAPdot looks like a saw.

The MAP trace looks relatively steady, but MAPdot is reading +/-200. There's one section where MAP is an almost constant 160kPa +/-1 and the MAPdot trace is reading ~+160-200 constantly

I'll try experimenting with the AE and noise filtering settings.

Ego correction is disabled, was planning to look at this once I'm happier with everything else.

 

where is the MAP line for the MS sourced?

 

I tee'd off the FPR line along with my boost gauge.

Thing is, if the high threshold for AE is 5000rpm, then as I understand it, AE should be having zero effect over 5000rpm meaning the jumps in PW must be caused by something else?