I've been buying a lot of car parts for a friend of mine off ebay. He's interested in a BBK throttle body for his '02 Vette, he found on ebay. The guy selling the throttle body says this on the page....

You are bidding on a used BBK Throttle body. I bought it from a memeber who had a much higher HP carvette. He had drilled a hole in it to help balance the idle. I took a dab of JB weld and sealed it. It can be removed and or changed. I ended up buying another car before I got arounfd to installing this.My questions are...

What was the point of the first person drilling a hole in it? I know he states it was to help balance the idle, but why? The person who is selling it states that he put JB weld and sealed it. What was the point in doing that? Now what kinda puzzles me is that the guy says the JB weld can be removed. Now, to the best of my knowledge, when JB weld sets, it's there for good. You'd have to be pretty strong or have a tool with good leverage to break JB weld off. And last but definatly not least, does this ad sound real to you guys? The way I quoted it, is the way the guy typed everything out. Those typos kinda look a little fishy to me. Well, thanks in advance guys, and I really appreciate any and all help. smile.gif

Sounds pretty ordinary, actually.

FI cars use a little motor that opens and closes an orifice, to control the idle speed. If the orifice is too small to let in enoug air when fully open, the car won't idle. There's a "minimum air" setting on most of them, where you close the idle air control motor fully and disconnect it, and then adjust a stop screw for soem slow speed like 450 RPM or something. At that point, the throttles are supposed to be near closed, and the throttle position sensor can them be adjusted to its spec value.

If you put too much cam in the motor, or otherwise raise its idle air requirements, it won't idle correctly within the throttle angle range it's supposed to; so for that, you drill the throttle plate. Just like a carb.

Then, if you have a stock motor and you get a TB from somebody with a hole drilled in it and you can't turn the idle back down far enough with the IAC set full closed, you'd have to fill the hole.

JB Weld is extremely easy to remove. It drills easily. Even easier than brass or aluminum.

Thanks for the info! graemlins/thumbsup.gif