I have read and read threads about what plugs to use but my car doesn't seem to like the Ngk BKR6E and it really doesn't like the BKR7E i tried the DENSO IK20 and the factory NGk's at one point and both would surge badly at full boost (18 PSI)

The plugs that work the best are the BKR6E but i still get some surgering under full boost but not as bad as I do using the BKR7E.

I tried to find the bosch F6DTC plugs today and napa by my house doesn't stock them. and im kind of not wanting to spend money on plugs that don't work just to take them back out.

One thing i wish i knew about my car is what flash chip it has since i think that would help getting this figured out.

Any suggestions

My car is a 01 with a k03-s, FMIC, ABD intake, mystery chip, adjustable fpr set at 44psi stock injectors and i think that is about it

 

You are gapping your plugs correctly, right? No plug will work well if its not gapped right. You def need them gapped differently than stock if you're pushing 18 psi.

 

the DENSO IK20 and the factory NGk's are irrduims and were left at factory gap
the Ngk BKR6E and the BKR7E were gapped at 0.30 and then tried at 0.28 with no change

 

Check your coils for proper voltage out...

 

how do i do that without curling my hair???

 

There are no factory NGKs. Bosch are the OEM plugs. NGK BKR6E is pretty much an OE style replacement. Try the BKR7Es gapped at .26. If that doesn't work for you, look elsewhere for issues. Spark plugs do not cause surging, it sounds like you have other issues.

 

I would also look at your diverter valve and your N75 valve.

 

maybe sugring is not the right term, when im under wide open throttle i get boost but when i get to 15-18psi the boost will bounce up and down on the boost gauge and you can feel it, it does it alot more with the BKR7E then it does with the BKR6E.

with the BKR6E it does the same thing just not as noticable, when i bought the car used i rember taking out some kind of bosch plugs.

I ordered 4 bosch F6DTC to see how they work since i have read that some members on here and other forums say they work get.
I seen a nice write up by chaos92287 on spark plugs, that answered alot of questions and what the differances are. but i can't seem to find it when i need it.

 

I the dv valve is freshly rebuilt and it did it before and after and i have a n75 valve pluged in to the inlet hose and on the elecrtial plug but the turbo feed side is capped off since i have my mbc running the turbo

 

https://www.audiforums.com/forum/audi-a4-8/newbie-guide-version-2-a-80968/