LT1-LT4 Modifications 1993-97 Gen II Small Block V8

BBK 58mm sticking at idle. Did the drill mod and IAC is 50.

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Old 03-28-2009, 08:33 AM
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Default BBK 58mm sticking at idle. Did the drill mod and IAC is 50.

Just installed a BBK 58mm TB. I have already dont the drill mod like in the stocker, set the TPS @ .70 and the IA motor has been cleaned and is bouncing between 50 and 55.

The throttle wants to stick just near idle with the engine running. However if the motor is NOT running, it does not stick at all. Sounds vacuum related. There are no signs of anything binding and the blades do not appear to be dragging.

Thoughts?
Old 03-28-2009, 08:46 AM
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Sounds to me like the blades are coming back too close to true vertical. Open them up a little and reset the tps.
Old 03-28-2009, 10:11 AM
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Originally Posted by 96capricemgr
Sounds to me like the blades are coming back too close to true vertical. Open them up a little and reset the tps.
I will do that next.
Old 03-28-2009, 11:28 AM
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assumeing the BBK is not defective....adjust the blade stop screw "slightly" to open the blades more as caprice suggests.

This will make your TPS and IAC counts be off so adjust the TPS (most likely by notching holes). then deal with the IAC counts (50 is already to high) by drilling the hole larger (1/64" at a time).

or sell the POS and put a stock bored unit on.
Old 03-28-2009, 01:25 PM
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agreed x3!
Old 03-28-2009, 06:57 PM
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When adjusting with the minimum airflow screw on the throttle body, and IAC, if you're able able to monitor the IAC counts, shoot for something in the low to mid 20s.

Jake

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Old 03-28-2009, 08:16 PM
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Did what you guys said, it is now fixed. Thanks all.
Old 03-28-2009, 08:35 PM
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Originally Posted by wrd1972
Did what you guys said, it is now fixed. Thanks all.
Just read your thread...glad to see you got it to work bro!
Old 03-29-2009, 05:48 PM
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Congrats! I had to tweak my BBK 58 too.

Jake



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