99ccz28

iTrader: (6)

Ok, to fill you in, I just had a nitrous plate kit with a WOT installed. At the same time I had a my converter flushed out and a built transmission installed also. Now when my car is in OD and the converter locks up, with my foot on the gas, my car will surge. The rpms go up and down about 400 rpms. Kinda like im doing it on purpose by tapping the gas. My car never did this before the installs. I have a dyno tune and it ran fine before. Anyone have any suggestions? Thanks.

TransAmcoupe98

iTrader: (10)

I know my stall does that when I'm in OD cruising and I just give it a little bit more throttle and it will surge a little, not 400rpm's though.

01ssreda4

iTrader: (96)

mine surges like a light bucking but not 400 rpms. wtf????
edit: like 40- 45 with lockup and almost no gas it bucks back and forth a tad.

TransAmcoupe98

iTrader: (10)

yea, thats actually normal. Are you sure its 400 rpms. make sure to look at it carefully when it does it again. More of a light buck a couple of times and then straightens out is normal.

99ccz28

iTrader: (6)

No guys this is not normal. The car never done this before, ever. Trust me, it is about 400 rpms. I did watch it closely. Even my girlfriend was like what the hell is that.

performabuilt

iTrader: (25)

I would get a scanner of it and see whats being commanded as far as lockup possibly engine missfire enable and disable on it, 400 RPM is not alot and could be the lockup especially if you have a stall

99ccz28

iTrader: (6)

But why all the sudden? There has been no change in the tune at all. I do not understand why it would just start doing this.

performabuilt

iTrader: (25)

You just had a nitrous plate installed ? Engine missfire ? Theres a starting place.

99ccz28

iTrader: (6)

So I would need a whole new tune if that is the case? How exactly would I find out? Thanks.

performabuilt

iTrader: (25)

Again get it on a tuner or scanner and watch the data and see what its being commanded is the only way to make that determination.