Hi All
I'm having an issue with my tune where I seem to have a 'flat spot' at around 1000-1100rpm.
It is most noticeable in 1st and 2nd gear when pulling away gently with a little bit of throttle. There seems to be no power at all, so press the accelerator a little more and a little more until all of a sudden the car lunges forward. It makes the car really difficult to drive and i find myself slipping the clutch a lot to try and lessen the impact. This surge can also sometimes become a bucking under certain conditions when driving around town where it is repeatedly surging and making me look like i don't know how to drive stick
My car is heavily modified with a stage 3 cam, 95mm TB, XDI injectors, LT4 HPFP, MTI low side secondary pump, Ported heads, Procharger D1x (28psi), decat headers and straight piped.
Additionally, when the car is cold I think there may be a fuelling issue as I get some backfiring when trying to accelerate moderately from a stop.
I've attached 2 log files from my town driving today.
cold_27421 - The backfiring should be within the first minute of log. I also tried to log as much 1st gear slow driving as I could to capture the lunging.
warm_27421 - You should see the flat spot and sudden surge within the first minute of this log, and also at the last few minutes some of
the 'bunny hopping'.
I REALLY appreciate any assistance you guys might be able to give.
warm_27421.hpl
James 2014 C7 M7 Procharged cam meth XDI CR tune 4.hpt
https://file.fan/1c1b1e4220dac4a1
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Originally Posted by Corvette4ever
