Hunting Idle.

[Alex B]

Cars up and running after engine swap and yes ideally it needs mapping however i have a hunting idle between 980rpm and 1500rpm.

This is the same on every map I use, I have a few to hand as well.

 

So I'm thinking buggered iacv?

[AlanS1]

Have you reset the TP on the Emerald?

Also the wiring to the TP?

[Steve J]

Have you checked for breather pipe leaks or intake/exhaust manifold leaks?

Or buggered lambda?

[Martin R]

Clean the IACV with brake cleaner.