MK7 "Random / "Stupid" Questions Thread"

[PerceivedShift]

Not a question, but this summer I kinda want an intercooler sprayer, because Im a child.

 

[Desslok]

Car has been running rough lately. CEL on

EQT stage 2. Have run this for most of the year with the rear O2 sensor unplugged, with only an occasional CEL from a WOT event, which never caused the car to run badly. Reset the code and it's good to go. These codes however, keep coming back.

Any ideas?


P0138/509C
O2 sensor bank 1 Sensor 2 high voltage

P0141/50A0
O2 sensor heater circ. bank 1 sensor 2 malfunction

P2096/3A6C
Post catalyst fuel trim system bank 1 too lean

P2271/49F6
O2 sensor stuck rich bank 1 sensor 2

 

[scrllock]

Car has been running rough lately. CEL on

EQT stage 2. Have run this for most of the year with the rear O2 sensor unplugged, with only an occasional CEL from a WOT event, which never caused the car to run badly. Reset the code and it's good to go. These codes however, keep coming back.

Any ideas?


P0138/509C
O2 sensor bank 1 Sensor 2 high voltage

P0141/50A0
O2 sensor heater circ. bank 1 sensor 2 malfunction

P2096/3A6C
Post catalyst fuel trim system bank 1 too lean

P2271/49F6
O2 sensor stuck rich bank 1 sensor 2

replace o2 sensor

 

[Subliminal]

this could have something to do with it:

 

[Desslok]

replace o2 sensor

That is the plan. The downstream sensor, correct?

 

[scrllock]

That is the plan. The downstream sensor, correct?

yep, sensor 2/the one you plugged back in. "post catalyst" is what you'd think.

 

[Agray]

Is it 100% necessary to use the backing plates that come on brake pads? On one of mine, the backing plate clips no longer secure themselves to the pad.

 

[Subliminal]

Is it 100% necessary to use the backing plates that come on brake pads? On one of mine, the backing plate clips no longer secure themselves to the pad.

if you mean the shim it'll probably be noisy as hell if you don't use it. brake lube should help some tho

 

[Desslok]

yep, sensor 2/the one you plugged back in. "post catalyst" is what you'd think.

Maybe it got carbon fouled from being unplugged that long?

 

[scrllock]

Maybe it got carbon fouled from being unplugged that long?

probably got fouled from his rich-ass EQT tune

 

[CaptainRatty]

What the…..

Cars been running fine to include this morning. Leaving from a stoplight, car went three-quarter full boost, then boost dropped down and banged 4-5 psi, had stutter, random -17 knock registered on AP, and EPC light came on.

I drove home the rest of the way, keeping it under five psi boost, and it drove fine….no knock, no studdering and no issues at other stoplights.

OBDeleven shows three engine faults but nothing specific. Going to use a generic OBD scanner later, but SEEMED like a fuel cut…. Could that be hpfp related? Bought it used so it’s the only thing that’s changed recently

What’s the word?

 

[swcrow]

What’s the word?

after doing a log and talking with Colby @PowerDemon and Drew (JerseyDrew) about it, my rail pressure drops as it hits high torque...essentially when I'm requesting boost more than 5-10 psi......-5 to -13 knock is being seen across the cylinders and disappears when I let off boost. Everything points to the used hpfp I picked up (only 40k). New hpfp arriving today, installing tomorrow and will relog tomorrow as well.

 

[CaptainRatty]

after doing a log and talking with Colby @PowerDemon and Drew (JerseyDrew) about it, my rail pressure drops as it hits high torque...essentially when I'm requesting boost more than 5-10 psi......-5 to -13 knock is being seen across the cylinders and disappears when I let off boost. Everything points to the used hpfp I picked up (only 40k). New hpfp arriving today, installing tomorrow and will relog tomorrow as well.

These damn HPFP's... getting one that lasts without some sort of issues seems rare. Hopefully, that solves it.

 

[swcrow]

These damn HPFP's... getting one that lasts without some sort of issues seems rare. Hopefully, that solves it.

no joke. Staying off boost is so.....not right

 

[StorableComa]

MPI > HPFP mainly because it seems like 1 out of every 3 HPFP fail..