View Full Version : wierd light load stumbles.

06-09-2009, 02:37 PM
I've started getting some really wierd light load stumbles that I can't track down.
Car idles perfectly, and runs perfectly under medium/moderate/WOT loads.
Just when at light loads getting into or out of the throttle.

I'll try and attach the one TunerPro file I made

and also 4 Powerlogger files

Maybe somebody will see something I'm missing.

.dat files
stumbles (occurs at time slice 13.8 and 16.2)
stumbles1 (occurs at time slice 22.2 and 27.8)
stumbles2 (occurs at time slice 21.5 and 31.9)
stumbles3 (occurs at time slice 4.5 and 10.5 and also -124 and -114??)

06-10-2009, 02:55 AM
Looks like spark drop out to me Dave.

06-10-2009, 11:57 AM
I'm pretty sure I narrowed the problem down to a flaky translator pro tps connection. Tpro was reading .14 at idle, while the powerlogger was reading the correct .44

06-10-2009, 12:05 PM
Rick, while I have your attention.

The following settings in my pro may or may not have contributed to the condition

.80 map tps min
2560 map rpm min
.50 maf limit tps threshold
5.20 maf limit
3.00 maf limit/krpm
1248 maf limit rpm min
2.00 maf limit time

Are these close to what you have, or do you see anything out of the ordinary.