Originally Posted by DarkPira7e (Post 3436098)

May be a coil pack going out. Swap out the passenger side front-most coil pack and see if that helps.

Take a datalog and upload it to datazap so we can see

Originally Posted by Escher (Post 3436116)

How serendipitous, just got into a discussion on a different forum where coil pack was the first thing mentioned.

For the datalog, are we referring to the whole shebang laptop-based log via the Ecutek software? Or is there a specific cross-section of sensors I can load into the phone app dashboard and log that would suffice?

Originally Posted by Escher (Post 3436116)

How serendipitous, just got into a discussion on a different forum where coil pack was the first thing mentioned.

For the datalog, are we referring to the whole shebang laptop-based log via the Ecutek software? Or is there a specific cross-section of sensors I can load into the phone app dashboard and log that would suffice?

Originally Posted by Tcoat (Post 3436124)

Serendipity has nothing to do with it. It the classic symptoms of a coil pack going bad.

Originally Posted by jflogerzi (Post 3436662)

Its a coil pack for sure. Blinking CEL is a mis-fire and normally tied to coil-pack. You also have a 2013 which they are known to fail, your boosted which causes more heat in the engine bay. Main thing you need to see what cylinder is mis-firing and replace that coil pack. Your Bluetooth app with ecutek can show you this.

Originally Posted by Escher (Post 3436792)

2015 actually! Missed the big issue bullet by that much.



But you all were spot on: coil pack was the haps. I found an outstanding deal on a full set of 4 packs, and since I am @ 80K anyway - when they're supposed to be replaced around 70K - I decided to swap the lot (what absolutely baffles me is the fact that I didn't come across any sources specifically mentioning them for the 65-70K maintenance; spark plugs were always mentioned, but not the coil packs...).



It feels like I'm driving a new car again. I don't know how long that pack (or multiple) were screwing with my power, but everything feels so much smoother on power now. Torque hiccups are a thing of the past as well.



An interesting datapoint and question: last night, upon starting the car after it was sitting for 10+ hours, I had a CEL. The following codes were thrown:



P1072 (System Too Rich Bank 1)

P117B (Direct Injector Fuel Performance)

P1170 (Direct Injector Fuel Performance)



Along with an ABS code and persistent light (plus orange cruise control light that can't be turned off once turned on):



C1201



Could these issues have been related to the bad coil pack(s)? I investigated this collection of codes, and it sounds like most people attribute them to vacuum or intake leaks. I went ahead and cleaned the MAF, and tomorrow I am going to do the EVAP line clamp, along with a smoke test.



The codes have not come back on today or since the coil + MAF work.



Completely unrelated: discovered a leak in the banjo joint on my JRSC C30 centrifugal blower while I was in there :cry:.



That'll be the next thing I suppose...

Originally Posted by jflogerzi (Post 3436794)

We're these stored codes or were triggered after the coil packs swapped? Bit confused.

Sent from my GM1915 using Tapatalk

Originally Posted by Escher (Post 3436795)

Sorry for the ambiguity, here's the timeline:



- Beginning of May through today: torque hiccups in 2nd/3rd @ ~5K RPM

- 24 hours ago: Turn on car and received CEL with aforementioned rich fuel/ABS codes

- 3 hours ago: Replaced all coil packs + cleaned MAF

- Drive home city + highway: Smooth AF power, no torque hiccups, no CELs

Originally Posted by jflogerzi (Post 3436799)

They can if the condition of the coil packs were that bad. They can cause minor miss fires at high rpms all they way down to no starts and other weird problems.

Sent from my GM1915 using Tapatalk

Originally Posted by Escher (Post 3443916)

OK, annoying update...

Yesterday, after almost exactly a month from replacing all of the cool packs with brand new ones (fixing all issues beautifully), one of them has started to go again.

Same torque hiccups, same RPMs, same gear.

I have a theory as to why, but first I'm hoping to get unbiased opinions on what would cause brand new coil packs to fail again only one month after replacement.

No tracking, definitely spirited accelerating though since. Thanks for the help all.