Lets start with what i got done with the car, chipped, injectors440 or equivalent, Coil pack conversion to ATW, FMIC, Baileys DV, MANIfold, fuel gauge on fuel line though i dont count this one just for reference ,Gt28 internal WG, and turbo back. MAF housing is larger dont remember maybe 3 inch.

Anyways i was getting a misfire code (and shake) before cause by the coils, i moved them around and they followed deal. And when id tryed boost more then 10psi it would like misfire and shake car. So i changed the coil out. After new coils in and plugs gaped at .023 - .024 range (BKR7E). My car idles better and start easier. Now it misfires/shakes when im above around 17+ psi to 23psi max. Also No CEl now



List of what i checkedor done so far:
1. Coil pack grounds (all good)
2. Coil pail pack 12v constant with igintion
3. Sprk plugs ( gaped .023-.024 range tried larger gap .028 made misfire/shake worse
started at 10psi so i went back to .023-.024)
4. Cleaned my MAF(maf cleaner liquid in can)
5. Compression is good
6. Coil harness checked and warped good

Things thinkning of doing:
1. check for vacumm leaks(did boost leak test about less than 1000miles ago)
2. Try known working MAF(or buy one)
3. Injector try cleaning by pulling put and running seaform in tank


Just wondering what everyone thinks, an any advice is appreciated.

 

Which tune are you running? 91/93 octane? Which misfire code are you getting?

 

Im not sure which tune my car is running i pretty much bought it the way it was, I usually get the premium at the G-station tho i dont pay much attention to which octane rating it is. Ill check next time, im almost on empty.
i dont have vag-com or limmewy.
Currently I dont have Missfire code right now or CEL on.

 

I wonder if it's an issue with your tune, assuming you even have one!

As far as CEL goes: the ECU can still store codes even if the CEL is off. If the car is misfiring it should store misfire codes.

If you get premium you should be okay. In California we don't get anything better than 91 octane, just wanted to make sure you weren't running less than 91.

If you can find out what your fuel trims are that might help as well... they can be found under Measuring Block 32 if you have access to VAG-COM.

 

my car was running great a while ago, no problems at all so i would think it should have a tune . i went to get my car scanned no missfire codes.
There a euro shop like 1 hour away that i went to before i would think they should have a "VAG-COM".
Anything i should try before i bring it the the euro shop i was talking about ?

 

The most common issue I see for bucking while spooling without a check engine light is a bad N75 (Boost Control Valve). If you are running a MBC, swap it back to an N75 setup and see if it works.

 

I tried something i think odd but it fixed my problem. I put in a set of push down coils from AWM motor instead of the ATW bolt down i just bought new and everything after that work. idk why but its better.