Very Low Timing at any boost lvl

[SiNiST3R]

Mods are current in profile.

I tried to tune for 14psi tuning boost all the way down. I could not get more than 5-7Deg of timing.

Turned my boost back to 22PSI same thing no more than 5-6deg of timing.

O2 is about 96-98
WB reading 11.5-11.7

I'm Runing BPR8ES right now 7s where a tad hot. but was not getting more than 5-7deg with them also.

[FonZ454]

Sounds like you are knocking bad. What are your Air Intake Temperatures? Try backing the boost down a little bit.. maybe 20 psi or so. Your AFR's are pushing it for pumpgas... maybe richen it a hair. Also, try some BR7ES plugs... or br8es's if you feel it's nessesary. The non-projected tip from what I found out helps a little with knock prevention.

What are your coolant temps at also?

[123bobby123]

Hi,

I would richen it to 11.0:1, see if this helps. If not then maybe run some high octane "race" gas to see if it is phantom knock. Check intake and coolant temps as was mentioned before. Also maybe try to seafoam the engine to get rid of any carbon (hot spots) in the combustion chamber. I would turn boost down to 14 psi until you fix the problem. Hope that helps.

Bill

[SiNiST3R]

All temps are fine, Car pulls very hard. Might try 100oct after i get a emtey tank.

[2gGSX]

Check for boost leaks (mandatory suggestion it seems), and then check if you've skipped timing. You may want to look through this thread and try that method if you want to ground it and hit it with a timing gun: Tuning question

[SiNiST3R]

Update-



Things that we have done and checked or possible problems:

No Boost Leaks – Tested for 25psi
Spark Plugs look brand new and are gapped @ .28 NGK BPRS8’s
Compression test is 160psi across all 4 cly
Base fuel Pressure is set at 43.5
Pulled it down and the Base timing marks all lined up the dowls are at 12o clock. and the 3 below matched up aswell.
Base Timing with the gun reads about 4*
I checked the Knock Sensor and its nice and dry no oze.


Here are the Current Mods/Parts that I have:

FMIC
Dejon UICP
Greddy Type RS BOV
Injen Hard intake pipe
FP 20G TD06
Trial 38mm WG
S&B Intake Filter
Walbro 255lph HP
3" VRS Turbo Back w/ o2 Elm (3" TEST PIPE)
ACT 2100
Aeromotive FPR A1000 set at 43.5PSI
FIC 850cc Injectors
HAFE Exhaust Manifold
1 GEN TB
DSMlink v2
GM 3Bar  I don’t have this installed yet.
AEM Wideband
ARP Head Studs
MLS HeadGasket
101200 COMP CAMS
Shepherd Racing Stage 2 Transmission

[2gGSX]

Post up a DSMLink log.

[SiNiST3R]

Here ya are I have also tried a new MAS and still same probs

[SiNiST3R]

these logs are very new

[SiNiST3R]

I kinda remember the shop shaving some of the valve when I got that head back (Had it decked so I can put it back on the block) I wonder if they took to much off...

I never had this problem with the other head I had on. The head was swaped about 1 year ago.

[2gGSX]

Your intake temps are consistently high--over 100 degrees high. You need to lower this somehow.

Your front O2 sensor looks like it's starting to die or malfunction in some way. Enable the DTCs and see if anything is wrong.

Is there any reason your global isn't at -42%? Your LTFTMid is showing +10% in that last log.

Capture ThrottlePosition, ISCPosition, and LrndIdleAdj, then make a log of your car from startup until 5 minutes after and post that.