fuel cut ???

[Talon_Tid_Tsi]

I just recently started working on my 95 TSI. I'm installing a header 16g evo III turbo 3 inch downpipe, and 3 inch exhausht, MBC, and FMIC. Before doing this I had a problem with what I thought was fuel cut. I added a greddy type rs BOV and at 4.5 K rpms the engine studdered like fuel cut. While working on my car i found that the vacum house going from the stock boost controller to the wastegate was cut, and realy not even on the wastegate. My question is that will not having that vacum hose to the wastegate cause a problem felling like fuel cut? I have fixed the problem, but the car is stillnot running. I plan on running about 8-10 psi on a 190 LPH fuel pump till I get 550 injectors,fpr, 255 wally, and a s-afc. Wondering if I need to look out for more things to avoid problems. I plan on a boost leakdown test before I start up the Talon as well.

Thanks,

Max

 

[wt71gas]

If you don't have a line going to your wastegate then it will never open causing the turbo to overboost. It could very well be fuel cut if you were maxing out the turbo's boost pressure. I would invest in a boost gauge when you get it running again and the wastegate hose hooked up to verify proper boost.

 

[kenamond]

That's exactly the type of situation fuel cut was designed to handle: wastegate actuator failure. The ECU detects too much airflow and cuts spark and fuel.

 

[Talon_Tid_Tsi]

That's exactly what I thought was going on. Wastegate not opening up. It would only hit fuel cut with the gredy bov, and not the stock bov, guess the greddy bov makes a big difference.Thanks for the help.

Max