ycode90
SHO Member
I have no need as I have no A/C or any thing else for that matter . How to tune around it so no CEL or could I just zip-tie it to the firewall and block off the holes .
IAC delete ?
- Thread starter ycode90
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
hawkeye18
Sorta cares
I do hope you're not actually talking about the IAC; the IAC is to a fuel-injected car as idle jets are to a carburetor. You can't just get rid of it. Why would you need - or want - to get rid of the IAC anyway?
ycode90
SHO Member
The IAC does nothing but compensate for A/C or other load at idle my car has none of that I don't need it it aggravates me I want it gone.
jmpSHO
SHO Member
It does a little more than that, why does it aggravate you?
Off Road SHO
Moderator
I'm sure if you're running a custom computer you could probably remove the Idle Air Control and just use the throttle stop screw to keep the plate open a little more; but you will have to put some black tape over the CEL. I believe the IAC goes to full open when it's not being used to control minimum air flow. It only necks down to idle flow when you're off the loud pedal.
Tom
Tom
ycode90
SHO Member
Mines bad cleaning doesn't help . What more than allow air past the throttle plate to raise idle does it do really? nothing. I don't want to be a dick but i did not ask "if " or "why" my Q is tuning related so only answer pertinent to0 the original Q please.
Thank you Tom.
Thank you Tom.
Last edited:
luigisho
SHO Member
Try Josh at shonut. He's big on getting the twEECer app. up and running, runs a heavily boosted SHO, and knows a bunch 'o stuff. If you hear anything outside this thread please post back with what you find out and experience.
Racer X
SHO Pilot, Retired
Not for nothing, but the IAC is not an On/Off sort of affair. The orifice for a specific idle varies based on a number of variables, including engine temperature, air temperature, evap solenoid state, not to mention it being key in controlling idle decay (how fast the engine returns to idle from an elevated RPM).
If your IAC is bad, there's always replacement. Just sayin'...
If your IAC is bad, there's always replacement. Just sayin'...
Racer X
SHO Pilot, Retired
Oh, and then there's the idle boost to compensate for the P/S load. Forgot about that one. Or increased load from the alternator. There's that, too.
The more I think about it, the more reasons I come up with why ditching the IAC is a bad idea.
Unless you have no P/S or alternator, then nevermind...
The more I think about it, the more reasons I come up with why ditching the IAC is a bad idea.
Unless you have no P/S or alternator, then nevermind...
ycode90
SHO Member
This is NOT a "street" car by any means I won't say what it has or not has. I've been using the Tweecer rt for years . Just never played with the IAC settings . I was just wondering really if anyone's ever deleted theirs and what was done for tuning.
As long as its not a street car, and you don't care about idle speed or emissions, you can eliminate the IAC and open the throttle plate stop enough so that it idles under all conditions. This will likely result in hot idle speeds of around 1000 rpm or so, from the playing around I have done...
I will join the others and say that its likely less painful to spend the $30 on a new IAC rather than mess with all of this, but its your car.
I will join the others and say that its likely less painful to spend the $30 on a new IAC rather than mess with all of this, but its your car.
ycode90
SHO Member
It sure would be easier not to make a spot for it.
hawkeye18
Sorta cares
Hey guys, how do I remove my fuel injectors? Some of them are sticking and I don't want to replace them, so can I just tune them out? I know you can do that with a TwEECer, right? I'll just tape them to the firewall, it is so annoying having them there. I'm pretty sure they don't do anything useful.
You could cross-drill the head across all the ports, and as long as you leave at least one injector on each head you can tune the others out.
gmorrell
Never been a noob...
So if you hit your finger with a hammer, do you just grab an axe and amputate your hand?
The IAC performs all sorts of functions, including idle speed control versus ambient and coolant temperature, compensating for varying engine loads as has been previously mentioned, throttle dashpot functions. When the throttle is open, EEC fully opens the IAC so it can "catch" the engine idle if the throttle is closed rapidly, etc.
If you think you can duplicate all that with a throttle plate jackscrew and some clever code, hey, knock yourself out.
The IAC performs all sorts of functions, including idle speed control versus ambient and coolant temperature, compensating for varying engine loads as has been previously mentioned, throttle dashpot functions. When the throttle is open, EEC fully opens the IAC so it can "catch" the engine idle if the throttle is closed rapidly, etc.
If you think you can duplicate all that with a throttle plate jackscrew and some clever code, hey, knock yourself out.
Shoaz
Studly dood
I'd strongly suggest unplugging the IAC, or even temporarily removing it and putting a cover over the hole, before deciding to permanently delete it. My car hasn't had A/C for many years, but when the IAC failed it drove me nuts. Got a replacement and life was good again.
And this was on a track-only car.
You really don't want to be trying to slow down for a corner or at the end of a run and the engine is still making power at 1krpm or so. And it's not consistent about it...sometimes it idles normally, sometimes 1k, sometimes 750. It's unpredictable. It's just all kinds of bad.
And this was on a track-only car.
You really don't want to be trying to slow down for a corner or at the end of a run and the engine is still making power at 1krpm or so. And it's not consistent about it...sometimes it idles normally, sometimes 1k, sometimes 750. It's unpredictable. It's just all kinds of bad.
Last edited:
Similar threads
