Drops in RPM when coming to a stop???
Drops in RPM when coming to a stop???
After my Hotcam and Stall, Im having a issue when I come to a stop the car drops in RPM, to almost stalling, then corrects itself. Ive been told to change the table w/tunercat under Main Spark Advance, but need to know whether to increase the numbers, or reduce them. Is this right or is there something else to it?
Re: Drops in RPM when coming to a stop???
Yeah thats not right. You might be able to help it by changing the IAC steps(increase them) I believe. Basically whats happening is the IAC isnt opening up fast enough to keep up with the air demanded by the motor to retain the idle. If increasing the steps doesnt work then you can pull off the throttle body and drill a slightly larger IAC bypass hole to let more air bleedy past the IAC so it doesnt have to work so hard. The IAC bypass is already there on the stock TB in the middle just below center... go a hair larger till the problem clears up and too big isnt good either.
I also see you have an air foil. Get rid of that thing. It blocks air flow to the IAC and to the PCV system... just removing that worthless mod could fix the problem.
I also see you have an air foil. Get rid of that thing. It blocks air flow to the IAC and to the PCV system... just removing that worthless mod could fix the problem.
Re: Drops in RPM when coming to a stop???
Sorry need to change my sig. I got rid of that piece of Crap Air Foil long ago. I was just told that reducing, or either raising the timing was the problem.
Re: Drops in RPM when coming to a stop???
Originally Posted by gamecockfan04
Sorry need to change my sig. I got rid of that piece of Crap Air Foil long ago. I was just told that reducing, or either raising the timing was the problem.
Re: Drops in RPM when coming to a stop???
Just for kicks, you may want to pull the IAC motor an clean her up just to be sure. Usually a pintle not seating will cause the opposite, {too much air} but it wouldn't hurt to check it before you drill the TB but then you probably are already ahead of me on that.
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