Idle after cam swap

**slacker4321** · 01-23-2009, 06:52 PM

Hello, I remember reading a post about drilling the hole in the throttle body bigger to help the idle, but I cannot find it. Does this help? Can anyone help?

**slacker4321** · 01-23-2009, 08:00 PM

????

**Mr. Luos** · 01-23-2009, 08:06 PM

Have you gotten the car tuned?
What size cam?

Some will drill a hole....I don't like that idea much.

**bills98ta** · 01-24-2009, 02:48 AM

Need a tune & there's an adjustment idle screw on the TB. Open it a half a turn.

**slacker4321** · 01-24-2009, 04:02 PM

First, sorry I posted in the wrong section. I have 2002 Z28 with an ls1. I have completely rebuilt the motor and installed a GM hot cam with full length headers, a ypipe, and magnaflow exhaust. It has a serious idle problem. I did the idle relearn helped a little. I have turned in the idle screw about 3 turns and I have driven it about 70 miles and it still will not idle the first time you put it in gear. I am going monday to have the pcm retuned. Thanks for the help. Any suggestions on gears(im thinking 3.73's)? Will post dyno numbers.

**mark21742** · 01-26-2009, 05:24 AM

Originally Posted by slacker4321

First, sorry I posted in the wrong section. I have 2002 Z28 with an ls1. I have completely rebuilt the motor and installed a GM hot cam with full length headers, a ypipe, and magnaflow exhaust. It has a serious idle problem. I did the idle relearn helped a little. I have turned in the idle screw about 3 turns and I have driven it about 70 miles and it still will not idle the first time you put it in gear. I am going monday to have the pcm retuned. Thanks for the help. Any suggestions on gears(im thinking 3.73's)? Will post dyno numbers.

dumb question, are you sure you turned the set screw the right way?.....i have a larger cam and only had to turn mine in about 3/4 of a turn