Advice with a stuttering issue (whwhwhwwhATTTTS WRONG?)

[FRANKIEWALLNUTS]

Guys I need some help. I’m stage 2 tuned with UM , catted downpipe, and intercooler. Cars been a absolute blast and very reliable. I started getting a stutter at 2200or so rpm getting into boost. Higher rpms it goes away. I changed plugs but the issue is still there. No codes stored at all. No misfire codes nothing. I did some reading online that said it could be the diverter valve is toast? I get tons of turbo flutter even at very low speed (going up my driveway actually). Sounds like little gremlin laughter under my hood as my girlfriend says lol. Any advice? I was going to buy a new diverter valve and coils but I don’t want to start replacing parts if someone may have a idea what it could be. Any help would be awesome. The car runs like hell after the stuttering clears up and it only happens soon as I lay into boost then as the rpms go up it clears up immediately. Please help I’m not sure what it could be. Thank you

 

[jimlloyd40]

Doesn't sound like the DV. I'll assume it was okay with that tune and it suddenly started to happen. How is it under any other condition like idling or a steady cruise on the highway?

 

[FRANKIEWALLNUTS]

Doesn't sound like the DV. I'll assume it was okay with that tune and it suddenly started to happen. How is it under any other condition like idling or a steady cruise on the highway?

Absolutely normal. No issues what so ever. Idle is perfect. Smooth on the highway. Zero sign of anything accept in the beginning of boost build. My car is DSG also in case anyone was wondering.

 

[daconchslop]

The turbo flutter makes me think it’s a the DV.

 

[ChrisMk77]

Absolutely normal. No issues what so ever. Idle is perfect. Smooth on the highway. Zero sign of anything accept in the beginning of boost build. My car is DSG also in case anyone was wondering.

Could be compressor surge also, had that happen when giving some throttle to pass at 2-3k and car would start to go but then hesitate with some vibration and surge. That was with Cobb sport DSG tune but now with EQTs it downshifts out of that area.

 

[FRANKIEWALLNUTS]

The turbo flutter makes me think it’s a the DV.

It’s really strange because it happens driving slow like 15 mph and I let off the gas and I hear it slightly. Idk what to think. Could it be a dirty map sensor?

 

[jimlloyd40]

EQT mentioned that the DV bleeds off boost under moderate acceleration and they fix it with their tune but from what you're saying this is a new problem.

 

[FRANKIEWALLNUTS]

EQT mentioned that the DV bleeds off boost under moderate acceleration and they fix it with their tune but from what you're saying this is a new problem.

It didn’t do this at all from when it was tuned until recently. Probably been 10k miles at least.

 

[daconchslop]

You can do a visual check of the DV and feel for issues with the diaphragm/spring. It should be smooth and easy to compress.

 

[FRANKIEWALLNUTS]

I’m reading also more possibilities. High pressure fuel pump and or cam follower? Any merit to this? The diverter valve seems ok.

 

[Reggie Enchilada]

Take a log and post it up. Should help to point you in the right direction

 

[daconchslop]

I assumed you couldn’t log with UM?

 

[Diggs24]

Cam follower is not an issue on the mk7 platform.

 

[FRANKIEWALLNUTS]

I assumed you couldn’t log with UM?

Not in any way I know how to to be honest.