1bad91Z

iTrader: (1)

I just installed a new Holley 58mm TB. The car idles like CRAP when it's cold, have to pedel it to keep it running until it gets warm! I've adjusted the idle screw out so it would stay running, but then the idle stayed to high (1600 - 1700rpms)after it was warm. So with the car running and now warm, I adjusted the idle down to 1200rpm. If I keep the car running at this setting, it idles fine until I turn it off and it cools down. With the idle set at 1200, it idles like crap when I start it again when the car is cool! I live in Houston, so the weather is between 75 - 90 all the time, so It's not cold weather causing it to do this. Also, I'm having a problem with the Transmission detent cable. The **** on the throttle linkage on the Holley is a hair bigger than the stock TB, so the detent cable cant swivel like it's supposed to!!! ANY HELP will be appreciated!!! By the way when the car is at operating temp, it screems now!!!

NEWMAN1786

you might have a vacume leak check the vacume line and make sure you hooked it back up to the throttle body plus sometimes if youve done a tb coolant bypass it could throw off youre tps

Heat Seaker

I had to modify my 52mm TPIS throttle body to get it to work properly, you may have to do a little grinding and cutting, they don't fit perfectly.

pandin

Sounds like the IAC is not working. Check the new TB vs the old for differences in the air passages. A blocked IAC passage will cause this type of trouble. IAC counts start at 140 and drop to 20. They follow the normal rise in idle speed as the engine warms up and always raise again to be able to restart. IAC counts up, idle speed up, counts down, idle speed down.