I had my s2 cams installed for a while with no tune and it idled fine. then i put the FP black turbo and drove it with boost all the way down to the shop to get it tuned. on the way there and after the tune the car drops to ~200 rpms and almost dies, usually saves itself but it dies every now and then. on my AFR gauge it reads super rich. any ideas what would cause the car to run rich and almost die. usually happens after being @ higher rpms. anything above 4k if im coming to a stop and put it in neutral the car tries to die.

 

It has to deal with your iscv settings. It needs a bit more demand in the lower rpm range to catch itself.

 

how would i change the settings?

 

take it back to your tuner, or get an Openport Flashing cable and use ECUFLASH to do it yourself.

 

okay thanks guys

 

I had the same problem, my tuner told me it had to do with the battery amp, and other ppl told me it was the mass air flow sensor(MAF) I took the car back to the tuner on speed density and problem solved

 

It's all in the tune!