Stealthparade
New member
- Location
- Monroe, CT
- Car(s)
- MKV GTI
Hi everyone!
Hopefully you guys can help me out with this problem I've been chasing on my MKV for quite some time. I've run some VCDS tests, logs and replaced parts that I thought could have been the culprits but I don't want to continue throwing parts at the car (I'll get more into this later). I've scoured the forums and found some similar situations and followed the guidance given to no avail.
Here's some info on the car:
-2008 MKV GTI FSI engine code: BPY (No current CEL)
-125k miles
-Timing was replaced at 115k. Injector seals and valve cleaning was done simultaneously.
-All coolant temp sensors have been replaced.
-AMR Performance Stage 2+
-Torque Solutions trans & engine mounts
-CTS Turbo downpipe
-SPM 3" Catback
-Lightweight crank pulley
-Updated DV
-Turbo outlet pipe with turbo muffler delete
-Forge boost pipes
-Throttle body pipe with noise pipe delete
-CTS Turbo air intake
-IE HPFP
There are multiple issues I have with the car however some may be related so I wanted to list all of them:
Issue 1: Rough idle when the car is hot or cold.
Issue 2: Low vacuum at idle. Normally it hovers around -13.6 and sometimes spiking to -20.
Issue 3: When coming off throttle above 4k RPM, the car will almost always violently buck.
Issue 4: About a half a cup of oil found in turbo muffler delete pipe when I went in and replaced the o-ring on the turbo.
Issue 5: Not hitting peak boost - should be between 21-23 PSI and it's hitting maybe 20 on a good day (Read on a P3 gauge).
Here's what I've done to try to remedy the issues:
-Corrected any vacuum leaks and smoke tested a few times to verify the leaks were fixed. Side note - anybody else's MKV's hate being smoke tested? Mine smokes like crazy when I drive it after I run a test.
-I replaced the catch can with the stock PCV valve but no change.
-Swapped out my warped air intake with a new CTS Turbo air intake but again, no change.
-Replaced the MAF sensor, no change.
-Removed DV spacer, no change.
-Replaced LP relief valve solenoid (the one on top of the HPFP).
-Replaced o-ring between the turbo muffler and turbo.
-Checked rail pressure and duty cycle for LPFP via VCDS. All checked out okay.
-Changed the vacuum pump on the driver's side of the motor.
After replacing the o-ring between the turbo muffler delete and replacing the LP relief valve solenoid, the car drives much smoother but the idle and other issues are still present.
I'd like to run more VCDS tests and logs but I'm just not too sure where to start.
Any ideas/suggestions would be appreciated!
Hopefully you guys can help me out with this problem I've been chasing on my MKV for quite some time. I've run some VCDS tests, logs and replaced parts that I thought could have been the culprits but I don't want to continue throwing parts at the car (I'll get more into this later). I've scoured the forums and found some similar situations and followed the guidance given to no avail.
Here's some info on the car:
-2008 MKV GTI FSI engine code: BPY (No current CEL)
-125k miles
-Timing was replaced at 115k. Injector seals and valve cleaning was done simultaneously.
-All coolant temp sensors have been replaced.
-AMR Performance Stage 2+
-Torque Solutions trans & engine mounts
-CTS Turbo downpipe
-SPM 3" Catback
-Lightweight crank pulley
-Updated DV
-Turbo outlet pipe with turbo muffler delete
-Forge boost pipes
-Throttle body pipe with noise pipe delete
-CTS Turbo air intake
-IE HPFP
There are multiple issues I have with the car however some may be related so I wanted to list all of them:
Issue 1: Rough idle when the car is hot or cold.
Issue 2: Low vacuum at idle. Normally it hovers around -13.6 and sometimes spiking to -20.
Issue 3: When coming off throttle above 4k RPM, the car will almost always violently buck.
Issue 4: About a half a cup of oil found in turbo muffler delete pipe when I went in and replaced the o-ring on the turbo.
Issue 5: Not hitting peak boost - should be between 21-23 PSI and it's hitting maybe 20 on a good day (Read on a P3 gauge).
Here's what I've done to try to remedy the issues:
-Corrected any vacuum leaks and smoke tested a few times to verify the leaks were fixed. Side note - anybody else's MKV's hate being smoke tested? Mine smokes like crazy when I drive it after I run a test.
-I replaced the catch can with the stock PCV valve but no change.
-Swapped out my warped air intake with a new CTS Turbo air intake but again, no change.
-Replaced the MAF sensor, no change.
-Removed DV spacer, no change.
-Replaced LP relief valve solenoid (the one on top of the HPFP).
-Replaced o-ring between the turbo muffler and turbo.
-Checked rail pressure and duty cycle for LPFP via VCDS. All checked out okay.
-Changed the vacuum pump on the driver's side of the motor.
After replacing the o-ring between the turbo muffler delete and replacing the LP relief valve solenoid, the car drives much smoother but the idle and other issues are still present.
I'd like to run more VCDS tests and logs but I'm just not too sure where to start.
Any ideas/suggestions would be appreciated!