06 Jetta 1.9 Rough idle, worse with AC or power load

[Always_broken]

Just bought an 06 Jetta, it had a bad transmission when I bought it. So a test drive was not in the picture. I did start and listen to it, it runs great when cold and with higher than idle rpm. As soon as it's too temp it shakes and vibrates the engine. Turn on the AC or rear defrost or turn the wheel (request power basically) it becomes much more violent. Steering wheel, floors, seat, body all "vibrate" badly. With everything off I can touch the go go pedal just enough not to raise the rpm on the cluster and it's smooth. Have to come up to 900rpm with AC on to become smooth.

Things I've tried
Cam torsion value changed from -1.9 to 0.1 (no change) currently at +3.4 no change. Going back to 0 today.

Alternator and tensioner pulley

Coolant and fuel temp sensors

Diesel purge and diesel from several places to eliminate bad fuel.

Tried to use battery charger while running(testing theory of no power with load)

Cleaned intake manifold. (EGR and intake manifold runner deleted)

Italian tune-up makes no difference. Runs great off idle. Any help or suggestions? Can post injector deviation when I get it warmed up. (Not Ross tech limited with obdeleven)

 

[oilhammer]

Check cylinder balance. Possible DMF. The BRM has no "intake runner", so... ????

 

[Rx7145]

Engine mounts?

 

[Always_broken]

Check cylinder balance. Possible DMF. The BRM has no "intake runner", so... ????

DMF was replaced with SMF. My scan showed code for"intake manifold runner position sensor P2016 " I thought this was the anti shudder? Am I wrong?

 

[Always_broken]

Engine mounts?

Mounts are solid no give. Seems really to be dependant on power draw even charging 13.5v

 

[Always_broken]

IQ deviation cyl 1is 0.54 mg/h
IQ deviation cyl 2 is -0.56 mg/h
IQ deviation cyl 3 is -0.33 mg/h
IQ deviation cyl 4 is 0.35 mg/h

Torsion value is 0.00 flat

 

[Rx7145]

I’m skeptical of your torsion value actually being zero, that’s very difficult to obtain and if it reads too far out of range the computer reads it as zero not dashes. I would double check your timing.

 

[Always_broken]

I’m skeptical of your torsion value actually being zero, that’s very difficult to obtain and if it reads too far out of range the computer reads it as zero not dashes. I would double check your timing.

I'll double check today, and adjust. I couldn't figure how to upload photos. I appreciate the help

 

[Mozambiquer]

Have you inspected your camshaft?

 

[Always_broken]

Have you inspected your camshaft?

I have inspected the cam, I can't see the followers/lifters to see if they're wearing through, as some reports from other threads. Maybe time to do a cam/timing belt job regardless

 

[oilhammer]

Maybe take the accessory belt OFF and see if the condition persists... also, does it change at all if you press the clutch in? How long ago was the flywheel changed? Something could be off balance in the clutch, too.

Your idle numbers look good to me.

 

[Always_broken]

I’m skeptical of your torsion value actually being zero, that’s very difficult to obtain and if it reads too far out of range the computer reads it as zero not dashes. I would double check your timing.

I was in fact on 0° I am now+2.9 after adjustment today. Still with the same issue

 

[Always_broken]

Maybe take the accessory belt OFF and see if the condition persists... also, does it change at all if you press the clutch in? How long ago was the flywheel changed? Something could be off balance in the clutch, too.

Your idle numbers look good to me.

It has no bearing on clutch in or out. It does seem the vibe/shake idle is definitely on the passenger side of the motor. Will pull the acc belt and test this as well

 

[Always_broken]

#update. Checked cam and lifters again and they look to be in good shape all the way around. No excessive wear on any lobes and no dishing on lifters. Injector rollers are also in good shape. I did remove the accessories belt and the issue still remains. Replaced cracked (but sealed) vacuum line on brake booster. Still the same and all other lines are intact. Replaced MAF because I had an extra in the shop, still the same. This is an irritating issue

 

[Always_broken]

Final update, drove across the country (cost to cost) and things got worse. Dropped a cam and lifters in this issue has resolved... But a new has come thank you guys for the help!!!