It's probably your plugs.

 

Thanks Mark. I really appreciate all the input.

I am only running 1 bar and stock turbos.

Would plugs cause the PSM/ABS light?

 

It could. Anything is possible.
U do have a misfire. Usually a misfire shows a CEL.
I'm guessing your MAf as well.
Who's tune. How old ?

 

My MAF is brand new as that is what I assumed the cause was originally. The tune is at least 4 years old from GIAC.

 

nearly anything that isn't quite right can trigger those. but this all reads like a continuation of your thread on "maf" issues awhile back, ( was you,.. yes? ) which don't sound solved. notwithstanding your new tb ( never a bad thing lol )..but you have experts helping you here, and i'm not.. but if you even have any question as to whether or not you have good new plugs and coils ( it's like 500 in parts that need more changing than they often are ) then you can/will drive yourself crazy chasing gremlins that are often the most basic things.

tuned turbos eat plugs faster than stock. mine just looked like sh*t after 10k miles. coils crack and you'd barely know it. take em out and look at em. small crack is all it takes until there is no doubt that'll cause sputters/hesitation! change that stuff, make sure you have a new maf ( which you've switched out? ), and you may find what's wrong on your own.
but sputtering and if it's ignition related and it isn't fuel? others mentioned it earlier, but plugs and coils is the first place to start. good luck with it. i bet it's something really simple.

 

And this started to happen after what? What did u do / change?

 

I appreciate all your input. I did change the MAF a few times (ebay MAF didn't work at all) OEM MAF seemed to work, although I do not know for sure as the car seems to be still having issues . I am hoping to hear back from GMG as it seems I have a new throttle body that I did not need .

Only thing I changed before this started was the steering wheel.

 

i'm still a bit embarrassed to have pointed you in the direction of the generic maf. it still works for me but perhaps if whatever other issues that are continuing to plague your car? are eventually sorted then the ebay maf might have worked!? point is, that the new bosch maf hasn't solved it either i'm guessing? but who knows. the important thing is to get some satisfaction from gmg who are reputed to be among the best in socal? so i'm sure you're in good hands. why you needed a new tb? i do not understand. sounds like they've got some splainin' to do also. i feel for ya bro. but again, check the plugs and coils or have them do it. you could be very surprised.

side note, i'm about to swap out MY steering wheel.. should i be worried? lol ( kidding ! ) again GL... i feel your pain

 

Thanks man. I am hopeful GMG will fix the issue since it appears they misdiagnosed the car completely.

 

i'm sure they'll say there was some diagnostic indication of tb issues? but..
do you happen to know how long it's been since you've even swapped plugs and coils? i hate to belabor this point, but... ? you gotta ask them to pull em and see. anyway.. if you haven't already, pls check them out!

 

Yes. I will check the plugs haha!

I am just surprised the GMG didn't data log the car. If I can do it with my somewhat limited experience and find a problem, I know they would be capable.

 

I'll throw my vote in for plugs or coils being the problem. that's always a good starting point when diagnosing misfires under load. Best of luck to you getting this straightened out.

 

Thanks for your input. The car is back with GMG. I will let everyone know how it progresses.

 

Any resolution to what the cause was?
I recently had coolant pipes welded, new water pump, reservoir, clutch and major service done at GMG. Very impressive shop.
They advised coils were ok so just plugs.
Car drove awesome for about 100 miles, then noticed slight hesitation and noticeably slower than I was used to, although car still hits 1.0 boost (car is tuned but I don't know whose tune or when done). Anyways shortly thereafter (50 miles +\-), got cel light with codes P0300,P0304,P0306, so drove back to gmg and tech did quick check over and advised all looked fine, also we took short test drive and he noted car seemed a little slower....he reset cel and said drive a few times to see if it returns.
Cel came back on within 10 miles.
When I got home I reset cel and on next drive cel lit up and code P0040 pulled.
Based on research it may be solenoid bracket broken, but would this cause hesitation at around 3-4k rpm I am experiencing?
Any help is greatly appreciated...

 

Just had this problem you should of replaced the coils thats your issue. You cant really see the hairline cracks but its there you need to upgrade to 997 coils.