I just got my pocketlogger. Ran about 10 logs yesterday, and my timing is about 10 to 13 degrees at wot. My O2 are at 98% and my EGT's are at about 1450 at the top of second. I wasn't able to run out a 3rd gear pull. This was done on 10psi boost!

I checked for boost leaks and didn't have any. I have stock 450's, T-25, stock FP rewired.

My fuel trims at normal driving are LTFT at 10% and STFT at +2 to -2. The OBDII does not log knock.

I think I am running rich because my O2 are at 98% but will running slightly rich pull timing?

Do you think it may be the dreaded phantom knock?

Yes, running rich causes misfire, which can be interpreted as knock and thus have timing pulled.

.98 o2's is not slightly rich, either.

Thanks,

It looks like my next investment is a S-AFC
Instead of a new turbo.

I dont understand why I am running so rich. All I did was rewire my stock FP.

Is this misfire really bad for the engine like knock?

What if I decrease my gap in my plugs, will that help until I get a S-AFC?

Originally posted by DCJ98GST
I dont understand why I am running so rich. All I did was rewire my stock FP.

Click to expand...

That's why you're running rich man. Your car runs a bit rich by design from the factory. The rewire made it worse.

Misfire is not as bad as knock. I would still avoid going WOT until you can fix it.

Decreasing gap wont fix the problem unless its the cause of the problem. Its worth a shot, though.

Thanks for your help. One more question.

I also datalogged at partial throttle between 2k to 3.5k rpm.
My STFT and LTFT when added are always above 0. Usually between 3 and 10 when added together. So that means the ECU is adding fuel at partial throttle. Why would it be adding fuel if the thing is already running rich? May it be running rich at WOT and Lean at partial throttle. Because, I know that fuel trims has nothing to do with the WOT numbers.

If added together they equaled 0, then it wasnt adding fuel.

Edit - Doh, misread that.

Cant really tell you, unfortunately. Doesn't make sense.

Could be that the rewire is more effective under higher fuel pressure.

Whats a good o2 voltage to tune for?