Idle and throttle body

[ride351]

So went I have the bbk 65mm Throttle body my car idles at 2500-3000rpm. I have replaced the IAC and the TPS twice, just to make sure. now when i put the factory Throttle body on it idles fine. Originally I thought it was because one of the screws was stripped out on the IAC but, I fixed that.
Also I unplugged the IAC and the car runs good but, I don't want to harm anything by doing that.

The computer is tuned for the 65mm.

Ported and polished gt40 heads and intake, 19 steeda cam, gears, etc....

Anyone have any idea why this is happening?

 

[jthorn9]

I've heard about issues with the BBK throttle bodies before, may want to shoot them an email and see whats up.

 

[birel21y]

Yes, BBK.. hmm.. mine broke in half.. but thats another story. Sometimes the throttle plate can not fully close, and you will have a high idle. you can test this most of the time by pushing back on the plate and starting it. If not, id check for a throttle body gasket leak.

 

[teestang66]

May be a ford motorsport tb would be easier to work with. Anybody know?

 

[sn95gtvert]

have you checked your tps voltage??

or could it be as easy as the idle adjustment screw next to the throttle linkage?

 

[ride351]

checked both, with no luck.

 

[sn95gtvert]

your setting your idle screw before messing with the tps right?
if this is done in reverse order it will mess up the tps setting.

 

[ride351]

yes. i even did it twice, battery pull and everything. Remember, the stock one does not have this issue with the same IAC and TPS.

 

[x182dan]

ya know I have a 75mm bbk and it decels real slow I wonder if that could be the problem. I replaced the iac a couple times so its not that.

 

[ride351]

there is a huge difference in my stock one and bbk one in decel. when I have the iac disconnected it decels fast.

I'm starting to think is the bbk throttle body.

 

[x182dan]

there is a huge difference in my stock one and bbk one in decel. when I have the iac disconnected it decels fast.

I'm starting to think is the bbk throttle body.

Well this is my second junk one then. My first was a professional products tb which really didn't cut it as far as quality goes. I NEVER had any decel issues with the car with that TB, but it had other problems like the iac fitment and butterfly not closing completely. I didn't know of the problem until I went and got the car dyno tuned and the tuner found the problem with the pp one. I got the bbk one shipped to him and got the car back after the tune with the new tb and it had the slow decel issue but I thought it was something in the tune not the TB. Now it seems like its the tb.

 

[ride351]

anyone on here have any suggestions for throttle bodies? anymore feedback on BBK?

 

[ride351]

ttt

 

[toyman]

Could try a FRPP TB. Haven't had any issues with mine.

 

[blk94_cobra]

bbk is junk i used the proffesional products and have had no problems on three diffrent cars ive installed them on.

 

[ride351]

good info guys, I appreciate it. I will try a new make of throttle body. anyone know of one for sale?

 

[ride351]

ttt

 

[Rice_slayer]

there is a huge difference in my stock one and bbk one in decel. when I have the iac disconnected it decels fast.

I'm starting to think is the bbk throttle body.

Well this is my second junk one then. My first was a professional products tb which really didn't cut it as far as quality goes. I NEVER had any decel issues with the car with that TB, but it had other problems like the iac fitment and butterfly not closing completely. I didn't know of the problem until I went and got the car dyno tuned and the tuner found the problem with the pp one. I got the bbk one shipped to him and got the car back after the tune with the new tb and it had the slow decel issue but I thought it was something in the tune not the TB. Now it seems like its the tb.

Thanks, i have that throttle body sitting in my storage room to go onto my car next week . If I don't have any problems with your PP one, I'll let you know