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Not accelerating well after ~4000RPM +P1549 +MiFi

1K views 1 reply 1 participant last post by  kurwa311 
#1 · (Edited)
Not accelerating well after ~4000RPM +P1549 +MiFi
My car is tuned with maptun stage 5 340HP 420Nm (AT)
APC valve is new. Turbocharger is new. Dump valve is new (Forge)
After I go for something higher than 4000rmp turbo gauge goes to yellow zone and car stops fast acceleration. Also a got lots of MiFis like 150 after 5 minutes of tests and P1549 Error is also on
Any ideas?
 
#2 · (Edited)
Turbo - TD0419t

I noticed R and C were connected incorrectly according to WIS. Connected like it shown on picture - no difference. Disconnected W - no difference, Disconnected R - no diffrence. Mreq is about 1350+ and mAir is about half of it when i lose my boost.


Oh as i understood i have to block R hose


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I also i had problems with airleak (probably) so mechanic checked all the lines and valves. Found that evap valve was bad, so I changed it. Also I had another problem 2 non Chinese walbros 255 died very fast. So I changed body(place where pump placed) and installed third walbro 255.
I will try blocking R as it shown on pictures on this forum, but even if it will help me I still think I got somewhere a problem which leads to my misfires, dead pumps and low boost…


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blocked R - no result
 
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