Dyno'd the nogaro today weird boost issue?

**s4quattro187** · 07-20-2008 08:56 PM

http://www.youtube.com/watch?v=hCQyyNDAc_A

On this graph you can see the A/F get really rich around 5,500 and the boost tapers from 14psi down to 11psi WTF?

the HP and TQ on this graph is 272hp 367tq I mean dosnt seem bad for only 14psi tapering to 11psi I may be wrong but the numbers don't seem that great for stage 2++

Mods are
SSAC dp's exhaust
APR 93 flash with 92oct
ebay FMIC
forge 007's
k03s have nearly no shaft play either but I guess they still could be faulty

**Redgoat** · 07-20-2008 09:38 PM

Its cutting boost back for a reason.. you need to log the car and log 032, and 112 for starters. Your EGT's may be high.. It could be a number of things but the car is cutting boost for a reason. Have you done a leak down test? It doesnt seem to drop off fast enough for a boost leak, but most importantly log and log some more

**s4quattro187** · 07-21-2008 12:14 AM

we log'd the 02's because it was giving a bank 1 sensor 2 I belive, when we logged all 4 o2's soon as I get on the gas they go 0.000, the graphs are all out of wack when in neutral the voltage is all over up and down then when its full throttle its like theres no signal. With APR I can disable the o2 sensor code since I have no cats correct? Do I have the option of using V-tune? I have done a leak down test after I installed the FMIC and I found a couple small leaks that I fixed right away but this was far before todays dyno. Maybe when I had the boost leaks from the FMIC it started dumping fuel to compensate? Ive been reading around and found that the EGT's go bad without throwing any codes, what kinda numbers should I expect when log'n the EGT's? onlything I can think of is the N75 witch I have no code for, EGT's witch I have no code for or when I had the boost leak something in the tune got F'd up. EGT's would explain the boost and richness, N75 would only explain the boost? Car has 131k btw