Shuttering after a pull..

[driftnfb]

Hey guys this is my first post- I just picked up up the latest mpvi3 and have been reading, watching videos and trying to get a basic grasp of tuning. I'll be getting my new "built" motor back in 2-3 weeks but pulled the data from the car. I remember having a random issue that would happen under boost at some very random times - the car under boost would back fire and the RPMS would drop to 1000 RPM, the peddle would be dead and the car would shutter- I would have to pull over, shut the car off and even sometimes disconnect battery before it returned back to normal.

the car is twin turbo'd, 1050x IDs, Speed Density, Fuel pressure at the rail is 58psi or so based on the gauge - Ive had the same tuner tune the car, and then revise the tune for more boost. I'm curious if there's anything in the tune I could revise for a better running car as well

Here is the file





rx7.hpt

[rabbs88]

Post a log of the issue if you have one. A tune file by itself won't help much.

What engine? Mods? Fuel system? Gotta help us a little here

[driftnfb]

I dont have a log. LS2, Turbo, Cam, ATI Damper, At the Time stock bottom end. dual 450s direct feed at the rail -8an, 1050x ID on e85

[Alvin]

This sounds like its going in to a reduce power mode. You'll need to be able to scan this when this happens to know what the cause will be.

[driftnfb]

ok thats what i was thinking it was hitting a safety.

[STAGEUP]

Might be hitting an APP to TPS disagreement. Do a "write entire" with this calibration
RX7 TEST 1.hpt

[edcmat-l1]

How about just post a damn data log of it doing it???? That would stop all the guessing.

[STAGEUP]

Lol!!!!!!!