blownstangboosti

I need some help guys I installed a Mac 75 mm throttle body on my car today and and used sct tuner on it. So the problem is the car drives fine up until after second gear this loud rattling starts and the car seems to lose power. I dont think it as to do with the tuner.before I tuned it had a very high idle 1000 revs to 500 normal. When the car is in drive it revs up to 750 thats what I set it to when its in park its over 1000 revolutions and i set it to 500.maybe i did something wrong?any help would be great thanks

sitnlopro99gt

what do you mean by used the tuner on it, what parameters did you adjust

blownstangboosti

just the shift points and pressure

sitnlopro99gt

I would undo what you did with the tuner since it will have no affect on the tb install and just for the hell of it see if it goes away because at that pt you could start to narrow somethings out....Dan

JamesTronix

+1

Restore the stock tune.

blownstangboosti

no but I'msure its not that before i used the tunet it would idle very high at 2k rpms so I'm pretty sure it's not that but tomarrow I'm going to undo the tune if that doesnt work put the old tb back thanks for the suggestions

cahtr6

Was this a new part? Did you use new gaskets sounds like a severe vacume leak

DTK

I could be wrong but many report their car idles higher after a TB install.
It takes a little time for the computer to learn it and then adjust itself for the different flow rate.

blownstangboosti

Yes everything was new crazy thing I put the stock tune on the car and now it revs to like 4000 by itself in park one of the throttle cables must be wrong I'm gonna take it off tomarrow and hopefully this stops but for tonight time to see the races.

Adam03GT

Revs to 4000 by itself?! Thats kinda scary.. Sounds like its getting close to being dangerous!