VW GTI MKVI Forum / VW Golf R Forum / VW Golf MKVI Forum / VW GTI Forum -

Go Back   VW GTI MKVI Forum / VW Golf R Forum / VW Golf MKVI Forum / VW GTI Forum - > Technical Topics > Golf R 2.0T Engine / Drivetrain / Exhaust / Tunes

Thread Tools Search this Thread Display Modes
Old 12-03-2016, 08:51 PM   #1
Drives: 2012 VW Golf R
Join Date: Oct 2016
Location: Saratoga Springs NY
Posts: 2
12 Golf R Cylinder 4 Misfire

Hi all - looking for some assistance on a cylinder 4 misfire that has been reoccurring throughout my troubleshooting today.

Car is a 2012 Golf R, bone stock with 78,000 miles on it. Oil changes every 6-7,000 miles. Otherwise maintenance is moderate but maybe not to the book.

Thursday night, stop for gas about 1/2 way home through my 45 mile commute. Shortly thereafter I attempt to accelerate in 6th gear from 2 to 3,000 rpm. Car bogs a bit, engine starts to shake and MIL flashes. I take it easy the rest of the home trying to shift to keep the car at about 3,000 rpm without excessive load which was where it seemed to want to live. Left it in the driveway Friday.

Saturday scan it with cheap OBDII reader. Shows P0300, P0301 and P0304. Clear the codes and start the car. Idles fine, take it for a short drive. Runs fine except for heavy acceleration/load (almost to complete WOT) from 2-3k rpm. I induced the MIL again to get another code. Shows only P0304, cylinder 4 misfire.
I switched the coil packs between 4 and 3. Misfire occurred at the same condition and remained consistent at cylinder 4.
I pulled the plug on cylinder 4 and it looked OK but I replaced it with a new NGK BRK7EIX. Cleared the MIL, took if for another drive, same condition and code, misfire at cylinder 4. At this point it seems coil packs and plugs are not the issue. Unfortunate because those were easy hitters.
I plan to grab the compression tester tomorrow and run a sanity check on the cylinders.

Help Request:
Anyone else had this issue of solid running car at idle, revs freely, and only misfires under wide open throttle, heavy load condition?
Thoughts on other issues I haven't checked yet?
My next considerations are injector issue or carbon buildup issues. Any thoughts on those?
I considered the O2 sensor but don't see why that wouldn't throw an additional code (like my Passat had) or why it wouldn't affect other cylinders.

Apologize for the long post but wanted to put everything on the table as I'm scratching my head here since I feel like I've hit the easy stuff. Thanks for any insight you can provide.
SacandagaR is offline   Reply With Quote
Old 12-04-2016, 08:49 AM   #2
Ready to race!
Drives: 2012 Golf R
Join Date: Oct 2015
Location: Mid-South USA
Posts: 21
bad wire or connector on cyl 4 ?
2012 VW Mk6 Golf R: IE Stage 2 IM Pro, Race Haldex
Neuspeed, Autotech, GFB, Newsouth Performance
Sachs SRE, 034 Motorsports, H&R, APR
OZ Racing, Continental, Powerstop, Hawk, Tyrolsport
light-spigot! is offline   Reply With Quote
Old 12-04-2016, 09:03 AM   #3
Formula 2 Driver
HYDE16's Avatar
Drives: 2011 MK6
Join Date: Sep 2010
Location: Morris County, NJ
Posts: 6,881
At this point it's an injector at that mileage.

You swapped plugs which could have gotten rid of a bad gap, although did you properly gap the new NGK plugs to 0.028". They never come gapped the same from the factory, even in a 4-pack. Re-gap to ensure equality.

Perform a compression test and/or leak down test for peace of mind at this mileage but I believe it's an injector:
Pag Parts EFR Turbo Thread: HYDE16 - The Pag Parts EFR Turbo Kit
Build Thread: HYDE16 - Project Jekyll & Hyde Build Thread
Facebook: Ryan Jacobs
YouTube: HYDE16
HYDE16 is offline   Reply With Quote
Old 12-05-2016, 03:04 PM   #4
Drives: 2012 VW Golf R
Join Date: Oct 2016
Location: Saratoga Springs NY
Posts: 2
Is there any way to test the injector or verify what it's doing during the misfire without pulling the manifold and then pulling the injector?
SacandagaR is offline   Reply With Quote

misfire, p0304

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 02:08 PM.

Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.