Running bad after new turbo install

[neals]

Hey folks. Just installed my r34 n1s on the weekend with a greddy suction kit and after everything was installed started it up and now it doesn't run good. At all. Showing low vacuum, idle hunting, back firing all that jazz. Did a check over and can't find any vacuum leaks. The car ran fine before just not so much now. Running a mines ecu for the time being that worked before the new snails. Any help is greatly appreciated. Thanks !

[neals]

Also should I add. It sounds like wastegate surge at idle you can hear coming through the intakes.

[h4X6]

Check MAFs. Sounds like it's in safe mode

[neals]

Checked mafs and cleaned them. No difference. car no longer starts. Smells like gas. Spark is good though. No fault codes showing on ecu.

[Bruizer]

so you changed turbos..... on your tuner car..... you'll need a tune for sure but sounds like you popped off an intercooler or turbo pipe/coupler and you have now fouled your plugs from all the rich fuelling.

[neals]

All couplers are intact and everything's tight. It ran before just not great. Now not at all lol. Regardless of tune it should have sat and idled, correct?

[Bruizer]

depends. if it was parked a while and you have crapidium plugs they may have fouled. change your plugs, start over the troubleshooting.

[Skym]

Using the wrong heat range sparkplugs or sparkplug gaps can damage the coilpacks.

Also you should retune ECU to suit the turbo's as they move more air at the same boost level = usually need to add more fuel.

Also check the intake gaskets, as they are known to blow causing idle hunting (revs up and down due to o2 sensor, ECU picking up on engine running very lean), etc.