IACV Delete. Anyone done it?

Post by **NafemanNathan** » Mon Mar 02, 2015 12:28 pm

That would require it being connected to the ECU then? Yet I don't think there's a connector on it... Only the coolant feeds.

Post by **Merlin** » Mon Mar 02, 2015 12:29 pm

Good point!

You can see the route it takes in this pic. No electrical connectors.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Mar 02, 2015 1:15 pm

Merlin wrote:dude (Targa250R)

Hmmm... After reading just 3 of his posts, he seems like a very patient, friendly and helpful kind of chap...

Post by **Merlin** » Mon Mar 02, 2015 1:19 pm

Yeah that is what I thought

I can find lots of examples of people doing the coolant TB bypass mod but no-one saying what it was originally for or how it did it.

Post by **Lude-dude** » Mon Mar 02, 2015 1:29 pm

I thought it might be a heater for the butterfly plate, in case of freezing

Post by **NafemanNathan** » Mon Mar 02, 2015 1:30 pm

Don't let Targa250R hear you say that!

Post by **Merlin** » Mon Mar 02, 2015 1:31 pm

I was thinking it was something like that but if the engine is stone cold, so would the coolant so it would be unable to warm anything

Post by **Lude-dude** » Mon Mar 02, 2015 2:16 pm

it would warm up, I dunno..

I wouldn't say it to targa he'd bite my head off

Post by **RattyMcClelland** » Mon Mar 02, 2015 2:41 pm

Sooooo then. I followed that esculater quite quickly and ended up here.

So I'll delete it...adjust the idle to compensate and basically just keep adjusting to find a happy place.

So really no different from my twin carbed 3rd gen. I was alwYs adjusting the idle on the carbs.

Post by **RattyMcClelland** » Mon Mar 02, 2015 2:44 pm

The Fitv is mechanically controlled and basically stays open on cold and as coolant flows through a wax substance inside heats up and shuts the valve so on cold start proper A/f is maintained.

Iacv is electronic and adjust idle according to vacuum and coolant temp after fitv is done.