IAC/ICV Delete...has anyone done it?

[shocwav3]

Curious if this has been done on any M50/M52's.

I have seen other platforms do it when running standalones, so I was thinking its a plausible option for us if there is a way to get the dme to ignore it.

I have no "NEED" to do it, but I wouldn't mind cleaning up under the intake a bit and simplifying the setup.

Can it be done with something like Miller's WAR chip or is a full standalone probably the only way to go?

TIA

[nando]

don't do it. there's no "cool" points to be had. all it will do is make driving the car when cold miserable.

[shocwav3]

don't do it. there's no "cool" points to be had. all it will do is make driving the car when cold miserable.

Does it operate beyond idle? I can't see it making a difference in drive-ability otherwise.

Have you ever seen someone try it?

I'm probably stuck on what I have seen work on other platforms. DSM's get rid of it pretty quickly when going for bigger boost, same with fords. Shit, there are plenty of cars I have worked on that got rid of both IAC and MAF and run MAP with per-configured settings under idle conditions (to include BMW's)

I should mention that my car is not a daily and adding forced induction is the end result.

Thanks for the input. Just trying to educate myself from others experience.

[nyChris]

I run an obd1 s52 with an m50 manifold.

My ICV is currently unplugged because it is faulty, and was causing my idle to surge. It runs perfectly fine once up to temp, and to my surprise it didn't trigger a CEL (I am not certain if the Turner chip omits ICV CEL codes).

The only problem I have experienced is on cold starts it will idle around 500 rpm. I am assuming come winter if I don't replace the ICV I will have issues with stalling at idle.

[shocwav3]

I run an obd1 s52 with an m50 manifold.

My ICV is currently unplugged because it is faulty, and was causing my idle to surge. It runs perfectly fine once up to temp, and to my surprise it didn't trigger a CEL (I am not certain if the Turner chip omits ICV CEL codes).

The only problem I have experienced is on cold starts it will idle around 500 rpm. I am assuming come winter if I don't replace the ICV I will have issues with stalling at idle.

That's interesting, so its probably safe to say its only controlling idle.
I figure it would have to be omitted via a tune in order to control idle directly off throttle plate position.

[DaveSmed]

The ICV will play just fine with forced induction. Just clamp down the hoses going to it if your going nuts with the boost.

Removing it just makes the car worse.

[matthugie]

That's interesting, so its probably safe to say its only controlling idle.

Idle Control Valve controlling the idle? Madness!

[shocwav3]

The ICV will play just fine with forced induction. Just clamp down the hoses going to it if your going nuts with the boost.

Removing it just makes the car worse.

Idle Control Valve controlling the idle? Madness!

The reason I was asking if it controls anything other than idle is everyone's response, that it will make the car run worse.... If its only controlling idle, than the car might idle worse, but run just fine...


I posed a question wondering if anyone has deleted it, and actually gone through the process of having the dsm ignore it. I've seen it done on other platforms and wondered why. Doesn't seem that anyone has done it on the M50/m52 motors, or doesn't want to talk about it.

Thanks for everyone's input.

[nando]

it sucks. that's why nobody talks about it. Guys who only drive it to a race track, sure. there's not really a great reason to do it other than "just because".

[jalopi]

Ever tried starting a carb'd car with a broken choke when it's cold outside? You live up north, if this car is gonna be driven in sub 60 temps deleting the IAC is a bad idea.

[DaveSmed]

The reason I was asking if it controls anything other than idle is everyone's response, that it will make the car run worse.... If its only controlling idle, than the car might idle worse, but run just fine...


I posed a question wondering if anyone has deleted it, and actually gone through the process of having the dsm ignore it. I've seen it done on other platforms and wondered why. Doesn't seem that anyone has done it on the M50/m52 motors, or doesn't want to talk about it.

Thanks for everyone's input.

If I had to hypothesize why it gets removed on other platforms, i'd look at the type of idle control they run. Theres various methods, some crap, some complicated, some more trouble than they are worth. I would guess the DSM idle control might not play nice with standalone engine management thats popular on that engine, but I am just speculating.

Fortunate for us, the BMW one is easy to control and use with standalone management, and its a German part with a wire sticking out of it thats actually fairly reliable making it quite rare indeed.

[justin_l_]

I'm still running it on my DSM in the 500hp range.

[shocwav3]

I'm still running it on my DSM in the 500hp range.

That my friend is comforting. I'm going to look up your build thread, I would very much like to see your set up.

[shocwav3]

I'm still running it on my DSM in the 500hp range.

I demand a build thread!

J/K-Maybe its on here, but I couldn't find it.

[GunMetalGrey]

I am running ms3x on my M50 turbo and left the idle valve in, it took me about 10 minutes of fiddling with settings (having almost no idea what I was doing) to get it to function correctly. To tune the idle you simply change the duty cycle of the valve. I don't know why you would want to take it out, but to each his own.