Spark plugs look terrible, especially the back ones






The back ones look lean, and show signs of detonation. The most timing I ran was 14 degrees and my IAT spark table is pretty aggressively pulling timing. My fuel setup has -8an lines to the front of each rail, then -6 lines from the back of both to the regulator....do I need some sort of crossover between the rails on the back end before the regulator? Highest injector duty cycle ive seen is around 90. This is with 60lb injectors and base pressure of 50psi with a boost reference.

I cant get my compression tester to thread into cylinder #8 (the one im most worried about, go figure), so I need to get a thread chaser tomorrow...

Results from the compression test, keep in mine it was 30 degrees outside when I was doing this

8-? 7-140
6-170 5-130
4-150 3-155
2-150 1-180

 

damn the luck!!

hopefully you get all this sorted out!

 

man this whole thing sucks. was thinking at first you pushed past the seals on the exh side of the turbo so you just dumped oil out the exhaust and never went through the motor but those plugs dont look good. 5,7,8 dont look pretty

 

Did you ever fool around with your knock sensor sensitivity? I can barely run 10 psi and 14° timing without KR.

 

I was getting some KR off-idle and low rpm and low load, but didnt really get a chance to figure it out yet. I messed around with the sensitivity a few years ago when I first started tuning, never had an issue until now.

Just checked, the base attack rate is 65% of the factory settings with that being the only change.

 

I think that 20psi+ action might of done more harm than laughter. I think the tune did you in, hopefully it's the turbo seal though...
Best of luck!

 

yikes man no liking the compression in the 5 and 7

 

Need to add leakdown test to your "to do" list.

 

Sux but I'm with spooler..

 

I drove it around fine after that for more than a day and didnt see any symptoms or damage, it was at 20lbs for no more than 3 seconds until I got out of it.