Hi fellas. I replaced my intermittant AFM during the week and the car runs better in some ways, but worse in other ways. Gone is the intermittant engine dying and limp-home mode 2.5k RPM limit that used to happen at any time of day, but now I have some brand new issues: BTW: car is a standard Z32 TT Auto 2+2 except for a new K&N pod filter (and very heavily tinted rear windows) 1. Hesitation. From rest, I put the pedal to the metal and the car dawdles off like an automatic Excel packed with 18 year old girls. After about 2 or 3 seconds the car then starts to go like a rocket. If I accelerate mildly from rest then the revs drop down or occasionally the car will stall. 2. Boost cut (suspected) - at around 3.5-4.5K revs under full load, the engine cuts power (though never stalls), as if it hits a maximum boost limiter. 3. If while in 1/2-3/4 pedal and 3-4K revs, I slowly lift off the fun pedal, the turbo boost stays right up around 5 (on the factory gauge), which confuses the auto box (and me). The auto stays in 2nd gear presumably because the high boost meakes it think we're still trying to accelerate fast. I'm hoping somebody can confidentally read these symptoms and give an easy answer. Let me add one more thing that I noticed. I was going to drop some boost jets into the vacuum lines that WYKKED Peter pointed out to me a while ago. But when I traced the drivers side vacuum line that was supposed to go from the intercooler exit pipe down to the wastegate, this line actually went from the intercooler exit straight to the balance tube, basically just bypassing the throttle butterfly. No wonder the car idles at 1400rpm. If I block this hose off the idle goes down to around 800 rpm but the hesitation is then much worse and the car stalls all over the place. Thoughts/advice/help?!? Thanks Aido
Mechanic time Aido sorry but that sounds difficult to diagnose behind a keyboard, might be time to get someone who knows Z's to have a look at it. This sounds like a classically simple problem (I can't see it needing big bux) but will need someone who knows their Z's to diagnose. Ben
