Won't rev past 2700 rpms, datalog/tune

nsusammyeb · Post by **nsusammyeb** » Fri Jul 31, 2015 9:44 am

2005 IS300
turbocharged
diyauto trigger wheel
vr sensor
ford coilpack w/ direct drive

Car runs great up to 2700 and hits a rev limiter it feels like. Almost like a 2 step. Launch control disabled, overboost disabled, rev limits right. No reason for the limit. The datalog shows some spikes in the iat, clt, and rpm. Tooth logger looks very clean.

basemaps.msq

wontrev3.msl

Matt Cramer · Post by **Matt Cramer** » Fri Jul 31, 2015 11:06 am

It's losing the RPM signal. Please post a tooth log of what happens.

nsusammyeb · Post by **nsusammyeb** » Fri Jul 31, 2015 11:54 am

thanks. not sure how to save the log file, hopefully i did it correctly.

rpmdropout.csv

nsusammyeb · Post by **nsusammyeb** » Fri Jul 31, 2015 12:01 pm

The Spark C LED flickers while the car is running as well. Not sure if it has anything to do with the issue. Spark A and Spark B stay constant.

Matt Cramer · Post by **Matt Cramer** » Fri Jul 31, 2015 1:33 pm

You saved it correctly.

Try a 10K resistor in line with the VR sensor input, and adjusting the trim pots.

nsusammyeb · Post by **nsusammyeb** » Sun Aug 02, 2015 9:13 am

Tried the trim pots with no improvement. I'll give the resistor a shot.

nsusammyeb · Post by **nsusammyeb** » Mon Aug 03, 2015 1:09 pm

the 10k ohm resistor took care of the issue. Thank you for a painless solution.

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Won't rev past 2700 rpms, datalog/tune

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