Annoying problem with large TB.

[suprafredde]

So I fabricated my own FFIM.
And since the ic is 3" and my pipe is 3" it seemed wise to go with a 3"TB...
Often at low speed cruise with low TB voltage the TCCS thinks Im letting off and
cuts fuel, and at lower rpm it returns just as its supposed to do. Around 1800 down to 1200 or so.
And the rpm goes up and down up and down...
If I had a 5 speed this wouldnt matter much, Im auto and its super annoying.

I have a maft pro and I think it has been used to manipulate TPS voltage.
Have not found how but Ill look into this more.
My other thought was if I could bump the lower TPS start voltage a few 0.1V without screwing with the entire range.

Any ideas?

suprafredde

 

[jetjock]

Codes? Sounds more like an IDL problem rather than VTA. IDL needs to go high as soon as the throttle opens and needs to go low just before it closes. It must also be high before VTA reaches 1.5 volts.