I recently installed a big turbo kit.. 850R from a fp green.. It is not tuned yet.. March 7,... anyways. I have noticed at idle it is rough sometimes wants to stall.... it also jumps drastically around a/f wise like 13's up to 17's..

would the turbokit flowing more air at idle be causing this or is it possibly something else overlooked.. I'm trying to get everything buttoned up so I don't have issues come dyno day.

by way only thing that is changed is turbokit to include downpipe, licp.

 

Are you running stock ecu??? A lot of time that large of a compressor can disrupt the maf readings due to turbulence, might want to try a longer intake tube to move the maf farther from the turbo

 

My car does the same thing after going big Turbo. MAP to MAF patched so the car doesn't want to stall anymore but still lean idles

 

Lean at idle is normal.... I'm sat about 15-1 on afr's at idle