95' TSi gets slower once warmed up.

[TheAznassassinX]

1. The car wants to stall out around 500-900 RPM unless I use the Biss screw to raise the idle to about 1500rpm, I know it isn't favorable but is there anything I can do?

2. The first 10min of driving, the car accelerates fine, going through the whole rev range all the way up to 6k, but after some driving, the car starts to bog down, not pulling as hard. It also likes to stutter at WOT or anything above 4k.

are these symptoms related? The TPS voltage reads 0.845 at 0% and 4.57 at WOT according to the SAFC.

Mod list:
-eagle h beams
-ARP HARDWARE
-ARIAS pistons
-balanced crank
-balance shafts removed
-new water pump and gasket
-hks 264/264 cams
-Revised lifters
-cometic metal headgasket
FMIC with custom piping W/ HKS SSQV flange
2.5" GM MAF and GM translator
Polyurethane motor mounts
3" exhaust with glasspack and magnaflow catback on rear
255 Walbro Fuel pump
Halman pro Boost controller
APEXI SAFC2
12'' Electric fan
Ported 2g manifold
evo3 o2 housing
Fidanza lightweight flywheel
exedy clutch and pressure plate
cxracing aluminum radiator
Short throw shifter
FP oil dump
FP stainless oil feed wrapped in heat wrap.


Edit: Also the heat sucks, very much so. is there anything I can do about it?

 

[mikej84]

I would try doing a boost leak test first then check all vacuum lines

 

[Rsawd95dsm]

How are you running a wastegate? By the sounds of it, it is internally and as the turbo heats up, the flapper is sticking open a hair.