So over the past week or so my car has been running a little rough when not in full boost. Fills almost if its running lean. my A/F is round 11.0. when in full boost there doesnt seem to be an issue still pulls hard all the way to redline. the issue is when taking off at low RPM not in boost. the car fills like it is struggling to get going fills this way in every gear. Idle is fine, as well as everything else.

Any ideas???

 

What is the AFR when it stumbles? Need to provide more input on your setup...

 

Weather changing? Maybe run a leakdown/Compression test? Maybe check the spark plugs?

 

I will diff check that age stumble tomm. Right now I'm on stock powerlabs gt35r running utec 600cc Denso injectors. 7.25lbs boost. Nothing fancy or out the ordinary has been boosted for about 1.5 yrs bout 8-9k miles

 

Cool cool. Good idea Thx man diff do that tomm.

 

11.0 under what conditions: idle, wide open?
Any CEL codes?

 

11.0 WOT and idle just bounces all over the place AEM A/F gauge, throwing Random misfire right now as well as No cat code

 

I 2nd checking the spark plugs, check coil packs too.