No signal to iac valve

[Lando]

have just converted my vs clubby to manual and have a 355 stroker in it with a manual loom and computer from a vn ss . It has a high idle and I’ve found there is no signal or power to my iac valve. Probed at both the connector and pcm. Any idea what to check next ??? Or what powers those wires? Cheers

 

[Deuce]

What intake mani you use? Any need to mod wiring?
Did IAC work previously or is it new since the swap?

 

[delcowizzid]

One pair makes it step in the other pair make it step out .do you have both constant 12v feeds to the eco and the pink switched 12v and both earths from the engine loom attached on the engine in separate places

 

[Lando]

I’ll check the power supply tomorrow. I thought that seeing as though the car runs that it would have to have power to the ecu

 

[delcowizzid]

Do you have a check engine light thats working .if it's in limp home mode the iac might not work

 

[Lando]

I have both constant power feeds and the ignition power. Engine isn’t in limp home as it drives fine just high idle

 

[delcowizzid]

Obviously a custom tune in it

 

[Lando]

What makes you say it’s a custom tune? Wouldn’t the 2 signal wires to the iac have power when operating the valve. ? Perhaps a dodgy loom?

 

[delcowizzid]

355 stroker won't run to well on a stock vn ecu

 

[Lando]

Yes I know it’s been tuned but that doesn’t explain why there is no power to the iac or do tuners sometimes turn that off