FIAV / ISC Discussion Thread

[slage]

with my FIAV blocked off and no coolant lines, I actually get the opposite as you Adam, my idle surges when cold, and after it warms up I get a steady idle...

[KeithMac]

The ISC opens in relation to coolant temp as well (as controlled by the ECU) so cold idle shouldn`t be horrendous.

I`ve internally blocked off the FIAV and car starts/runs/idles fine.

[AdamVR4]

with my FIAV blocked off and no coolant lines, I actually get the opposite as you Adam, my idle surges when cold, and after it warms up I get a steady idle...

But I didn't actually have the FIAV blocked I'd much prefer the problems you described.

At the same time, I want it reversible so that when the day comes that the cold idle issues bother me, I can reconnect the coolant lines

[Jimvr4]

I used a chisel to pound a slot into the head then used a large flat head screw driver. Worked like a charm...

Same problem but I solved it by pounding a 2mm square drive bit into the head and then they turned out like they were socket head to begin with

I used chrome socket head cap screws and separate lock washers. They don't have to be captive as you're probably not going to take this apart very often.

[AdamVR4]

I used chrome socket head cap screws

Wow, I didn't even realize they made 'highly polished, chrome plated' stainless steel screws. Mcmaster doesn't seem to have those in M5 either.

[anyonebutme]

Adam, you need to hang out in chatbox for longer, otherwise I could have saved you some effort and money.

Links you missed in chatbox:

Free FIAV Block - DSM Forums

Level Zero Motorsports

Level Zero Motorsports

[Jimvr4]

Wow, I didn't even realize they made 'highly polished, chrome plated' stainless steel screws. Mcmaster doesn't seem to have those in M5 either.

I think I used www.chromebolts.com and www.afchromebolts.com.

[green-lantern]

I guess I should read the links before I ask but other than saving 30 seconds unhooking the hoses and a few drops of coolant is there any other advantages to leaving them off? I guess if I was at the track and wanted to change the gap or plugs while the engine was still warm it would be an advantage but other than that I've never seen the reason to leave them off. A buddy of mine complains more about these problems than anything else but he wont hook them back up.

[AdamVR4]

I guess I should read the links before I ask but other than saving 30 seconds unhooking the hoses and a few drops of coolant is there any other advantages to leaving them off? I guess if I was at the track and wanted to change the gap or plugs while the engine was still warm it would be an advantage but other than that I've never seen the reason to leave them off. A buddy of mine complains more about these problems than anything else but he wont hook them back up.

Ha! I've got a new ISC ($50 on ebay) on the way and the FIAV block off plate + gasket. If I can't make it idle the way I want, I will put the coolant lines back on. I just want to see if I can make this work first.

[green-lantern]

Ha! I've got a new ISC ($50 on ebay) on the way and the FIAV block off plate + gasket. If I can't make it idle the way I want, I will put the coolant lines back on. I just want to see if I can make this work first.

Well let me know how it works out. This is something I've wondered about.