wastegate question 1.8t

[AUDI COUPE 20V]

not an s2 but i have a wastegate question car is a audi a3 which has k03s which has 180bhp 0.8 bar with n type actuator which i think is a stiffer spring they say to cope with higher exhaust gases than the normal 150bhp actuator , but i have had my car remmaped and is producing around 220bhp around 1.3 bar on gauge so can the actuator hold as my car does not hold boost as well as it used to when first mapped , i have tried a n75 , and vag com showing no codes .?
any help appreciated

[Knight Rider S4]

Have you pressure tested the boost pipes?.220bhp from a K03 is pretty good!!

[AUDI COUPE 20V]

i have tested the pipes seem ok the turbo is a k03s which is better than the k03 , wouldnt the gases just push the wastegate open with the extra pressure?

[Knight Rider S4]

Did you do a output test with vag.com to see the N75 was operating properly

[AUDI COUPE 20V]

yes the n75 was clicking

[Knight Rider S4]

what DV do you have on or is it a BOV?

[AUDI COUPE 20V]

dv is forge 007p also tried 710n

[Knight Rider S4]

Only other things i would look at is the MAF and all the vacuum pipes...never heard of actuator failing..... is possible i suppose

[AUDI COUPE 20V]

would maf cause boost to tail off , what happens is it hits 1.3 bar then drops off 1 bar or less sometimes i will be off boost and hit boost it will not budge above 0.8 until i come off pedal and back on then it would be ok again but would still tail off?

[4WheelDrifter]

A K03 can do more thn 1.3 bar. :mischeif:
I've seen <1.5 bar without any wastegate problems. Although a friend of mine had his wastegate fall apart resulting in no boost. He found the wastegate valve in his cat.

Are you sure it isn't a boost leak? Have you presure tested it? There are a lot of vaccum hoses around the N249 for example.

[AUDI COUPE 20V]

i had bypassed the n249 valve , just a pipe from mani to dv