penance
Fakinsupa
- Location
- BC West Coast
- Car(s)
- GTI
So I recently went KO4 (existing Stage 2+ customer) - the following is everything that was done to the car:
INSTALLED:
-APR K04
-Runner Flap Delete
-APR K04 tune file + RFD software (confirmed with APR that the dealer did install both... I had to remind dealer about RFD prior to picking up, they forgot twice)
-S3 Injectors
-R8 Coil Packs
-Diverter Valve (Rev. D)
-NGK PFR7B Double Platinum Spark Plugs (.028" gap)
-Godspeed v2 Intercooler
-Carbon Valve Cleaning
EXISTING ENGINE MODS:
-Forge Twintake
-Forge catch can
-APR HPFP
-APR Downpipe
REPLACED (so far):
The battery was replaced last week, mine was old and due for it... APR support said that was step one trouble shooting. So I replaced it and it made no difference.
PROBLEM:
Cold start is hurting like a mofo, and I'm getting high RPM misfires.
On cold starts the engine struggles a bit to get going - misfires, skipping a step but catching itself on the next to get going (fails to start first try about 10% of the time). Once the engine is warm, and for a reasonable few hours after being turned off, you can start up without any hesitation.
(APR 91oct file)
When I put the car back into stock program mode, the cold starts were even worse! I'd liken it to the 2 days between installing all the hardware above, and getting APR dealer to install the K04/RFD tune. Starts harshly like I don't even have the RFD software present.
I plugged the ol' Vagcom in last night (while in 91 oct tune) and gave it a couple cold starts. Had a couple misfires, usually always across cylinders 1-3. Cylinder misfire pattern so far has been: 1-1-1-0, 2-2-0-0, 1-1-2-0, 2-2-1-0.
Once the car is running it seems to be okay, until you WOT... then it misfires quite a bit above 6000rpm.
I ran the APR Data Logs last night, and noticed today looking at them that none ever made it to 7200rpm like I see on others charts. It topped out at 64-6600rpm on most all logs, even though my needle was bouncing off the red-line on each run..
(Logs done in 3rd gear - 2am, 10 celsius, sea level. I don't have "Turbo" option on vagcom, so i changed the INT values to 25/0.)
QUESTIONS:
In the beginning, before looking at all into it, I figured it was a bad spark or coil. But if the misfires are not all focused on one particular cylinder that wouldn't be the case, correct?
I'm not getting any unusual instrument lights, and nothing out of the ordinary on Vagcom error scans.
What's the best measurement block combination to log for cold start problems?
DATA LOGS:
You can see all the logs I got last night, and my vagcom scan afterwards.
https://drive.google.com/folderview?id=0BzazITulD-5_Yy1GQVQ5M0YwekU&usp=sharing
I didn't know what would be the best values to graph, so I did a few from APR Log Diagnosis #5. Anything else is in excel format at the above link.
I'm not proficient in reading these logs, so I appreciate any MKVgearheads that can chime in. I'd really like to figure out if my coldstart/misfires are tune issue, or if the logs show a hardware issue.
I've had this tune for about 2.5 weeks now, and I am not at all impressed with this. Car ran and started fine prior to this upgrade.
Thanks! :thumbup:
INSTALLED:
-APR K04
-Runner Flap Delete
-APR K04 tune file + RFD software (confirmed with APR that the dealer did install both... I had to remind dealer about RFD prior to picking up, they forgot twice)
-S3 Injectors
-R8 Coil Packs
-Diverter Valve (Rev. D)
-NGK PFR7B Double Platinum Spark Plugs (.028" gap)
-Godspeed v2 Intercooler
-Carbon Valve Cleaning
EXISTING ENGINE MODS:
-Forge Twintake
-Forge catch can
-APR HPFP
-APR Downpipe
REPLACED (so far):
The battery was replaced last week, mine was old and due for it... APR support said that was step one trouble shooting. So I replaced it and it made no difference.
PROBLEM:
Cold start is hurting like a mofo, and I'm getting high RPM misfires.
On cold starts the engine struggles a bit to get going - misfires, skipping a step but catching itself on the next to get going (fails to start first try about 10% of the time). Once the engine is warm, and for a reasonable few hours after being turned off, you can start up without any hesitation.
(APR 91oct file)
When I put the car back into stock program mode, the cold starts were even worse! I'd liken it to the 2 days between installing all the hardware above, and getting APR dealer to install the K04/RFD tune. Starts harshly like I don't even have the RFD software present.
I plugged the ol' Vagcom in last night (while in 91 oct tune) and gave it a couple cold starts. Had a couple misfires, usually always across cylinders 1-3. Cylinder misfire pattern so far has been: 1-1-1-0, 2-2-0-0, 1-1-2-0, 2-2-1-0.
Once the car is running it seems to be okay, until you WOT... then it misfires quite a bit above 6000rpm.
I ran the APR Data Logs last night, and noticed today looking at them that none ever made it to 7200rpm like I see on others charts. It topped out at 64-6600rpm on most all logs, even though my needle was bouncing off the red-line on each run..
(Logs done in 3rd gear - 2am, 10 celsius, sea level. I don't have "Turbo" option on vagcom, so i changed the INT values to 25/0.)
QUESTIONS:
In the beginning, before looking at all into it, I figured it was a bad spark or coil. But if the misfires are not all focused on one particular cylinder that wouldn't be the case, correct?
I'm not getting any unusual instrument lights, and nothing out of the ordinary on Vagcom error scans.
What's the best measurement block combination to log for cold start problems?
DATA LOGS:
You can see all the logs I got last night, and my vagcom scan afterwards.
https://drive.google.com/folderview?id=0BzazITulD-5_Yy1GQVQ5M0YwekU&usp=sharing
I didn't know what would be the best values to graph, so I did a few from APR Log Diagnosis #5. Anything else is in excel format at the above link.
I'm not proficient in reading these logs, so I appreciate any MKVgearheads that can chime in. I'd really like to figure out if my coldstart/misfires are tune issue, or if the logs show a hardware issue.
I've had this tune for about 2.5 weeks now, and I am not at all impressed with this. Car ran and started fine prior to this upgrade.
Thanks! :thumbup: