I have seen a couple threads on this, so I am assuming its fairly common.

I can hear what sounds like an exhaust leak, especially while engine braking. Sounds like its coming from the turbo or the downpipe area. Also, I have a strange boost pattern and seems like its lacking some power.

DOes this seem congruent with those of you who have discovered cracks in your turbo manifolds??

Also exhaust temps are between 500 and 700 degrees Celcius.

FMIC
3"DP
CATBACK
STOCK ECU
APEXI INTAKE
KOYO RAD

 

If the crack go past the gasket then you need to fix it .I weld them back with nicad rods .The best way to do it is grind out metal around the complete port and weld it back to shape and mill the surface flat . Repairing cracks is a part of my Rich Mans non seq mod .

 

I am pretty sure i still have my manifold with no cracks...i'll check if your interested

 

To the op, how's that stock ecu working for you with those mods? Do you have a midpipe or high flow cat too? Are you boosting 10psi or more?

 

Boost pattern - usually about a 10 - 5 - 12, but I only let it do that once or twice. I try to keep out of it, because I venture to guess that my mods are reaching the max of my ecu. Sometimes it just sits at about 5 psi and its gutless. also I can hear a large rush of what sounds like boost leak at full throttle especially the lower the rpms when I gun it. I have smok tested it and pressure tested it, the only smoke I see comes from the throttle linkage, which i have heard leak at times...

Vacuum is 14 when its warm... no good...

stock cat. I hope I didn't kill the motor, there hasn't been any catastrophic change in driveability since I got it running. the only thing thats changed is the engine vacuum. it idles fine. SOmething is wrong, just hoping its something less than a motor right now.