Spark Plugs problem...

[sharkemir]

hello ,
i have 1998 audi a3 1.8T (AGU engine code).i applied gt28rs turbo kit.everything works fines until i was trying my car. i was using NGK PFR6Qs.but its alwyas misfire and yesterday the car didnt run.i took out the plugs and they were like coal.i changed them again with pfr6q s.and they done the samething.so what spark plug do you use for BT upgrades ? which one is best for me ? what should i use ? any comments or suggestion ?

thank you

 

[DPJ]

hello ,
i have 1998 audi a3 1.8T (AGU engine code).i applied gt28rs turbo kit.everything works fines until i was trying my car. i was using NGK PFR6Qs.but its alwyas misfire and yesterday the car didnt run.i took out the plugs and they were like coal.i changed them again with pfr6q s.and they done the samething.so what spark plug do you use for BT upgrades ? which one is best for me ? what should i use ? any comments or suggestion ?

thank you

What mapping are you running?
I use Denso Iridium IK22

 

[sharkemir]

i'm using a custom mapping which is done by Wimmer-rst from Germany.

 

[phil_m]

I have the same problem with my AGU, if i use Iridium or PFR6Q plugs, But if i use the standard plug BKUR6ET-10 its fine, and they have never let me down.

Phil

 

[sharkemir]

so you run with stock spark plugs ?
i thought the stock plugs are NGK PFR6Q

 

[phil_m]

so you run with stock spark plugs ?
i thought the stock plugs are NGK PFR6Q

Not for AGU only BAM and AUM.

 

[myk3]

use BKR7E NGK copper plugs gapped to around 0.28

change every 5k miles with oil change

 

[HTC]

Perhaps try a range colder on the plug or tighten the gap on them. Or do both.

 

[myk3]

Perhaps try a range colder on the plug or tighten the gap on them. Or do both.

BKR7E NGK is 1 step colder than stock

 

[sharkemir]

alright, let me try BKR7E.actually i don't know the advantage of 1 step colder sparkplug.what is the advantage of this ?

thank you

 

[Ibiza sport man]

i'm using a custom mapping which is done by Wimmer-rst from Germany.

Sounds like the mapping is wrong and you are running way too rich at some point in the rev range.

Bernard

 

[sharkemir]

Sounds like the mapping is wrong and you are running way too rich at some point in the rev range.

Bernard

or maybe there is a leak i guess ? is it posibble ?