Accufab TB/Plenum

[ShapeShifter]

alrite guys not so long ago i purchased an Accufab TB/Plenum combo, the TB was 75mm...and the problem im having is after a buddy and i installed it my car seems to hesitate(bogs?) for a sec and then takeoff...so i thought maybe i needed a tune, so i already had a Tuner so i finally tuned it and problem is still there...ok,so i thought the throttle body was too large for my N/A car with minimal mods,i.e....Exhaust,CAI,Tune,TB/Plenum...so i swapped out the 75mm throttle body for a 70mm one...im still having the same problem just not as bad...what could be wrong?....

 

[Susky]

Could it be that, with the increased air flow, you're now running a tad lean? When you stomp on the accelerator, you're seeing a delay as the fuel system tries to catch up?

I noticed a little of that, too, when I put in my BBK 75mm. I used my SCT to tweak things a bit, but I think there might be some more adjustment needed.

 

[myponyrocks]

you should have been fine with the 75mm. The only thing I can think of is you left one of the tubes loose. You may also have a leak in the main air tube.

Another thing is... did you disconnect the battery for a decent ammount of time? If not do this, the computer could be confused with the new air flow.

 

[bgrd351]

you may have to reset the PCM so it can relearn the TPS setting

 

[myponyrocks]

you may have to reset the PCM so it can relearn the TPS setting

I knew I forgot something, get a vol-meter or go to autozone or something and have them check the volatage on the TPS, should be .98-.99 I believe

 

[Todd00GT1]

I have a 75mm BBK w/C&L plenum and it improved my throttle response. Try resetting the ecu and drive it like hell the first few times.

 

[ShapeShifter]

Could it be that, with the increased air flow, you're now running a tad lean? When you stomp on the accelerator, you're seeing a delay as the fuel system tries to catch up?

I noticed a little of that, too, when I put in my BBK 75mm. I used my SCT to tweak things a bit, but I think there might be some more adjustment needed.

yep, i punch it and it delays for like a tad sec and then goes....

 

[comporange04GT]

An air leak between the upper plenum and the intake manifold could cause this condition also.

 

[the98stang]

Check all vac lines, TPS, PCV with grommet, IAC. You could also use a fuel cleaning treatment.

 

[speed545]

did mine with the exact same combo 3 weeks ago and had zero problems. You must have a vacuum leak.

BTW, that was my most SOTP feeling mod since im modding that boat

 

[ShapeShifter]

so how do i fix this leak?