Chrome ECU - Front bank stuck rich

[DrGonzo]

So I'm working on getting the idle down and having an issue with the front bank always being rich. Low Trim is stuck at -12.5 and feedback sits at -15. I have 550cc injectors installed and I have the injector size in chrome all the way up to 647cc. Adjusted the VE table in the idle range 0-100 to the below:

0 - 86.7188
25 - 86.7188
50 - 83.5938
75 - 87.5
100 - 89.8438

I bumped the accel enrichment down to 9.5

Rear bank O2 is cycling as it should, front bank sits at .78-.80 and only moves if I give it throttle. Then eventually goes back up. After some time the front O2 feedback goes to 2.5 and just sits there.

I have done a boost leak test and it is all good. all exhaust gaskets where replaced when I did installed the new turbos. All three front injectors are black so it's not a single stuck open injector.

Anyone got a clue as I must be missing something somewhere??

https://www.dropbox.com/s/x82sav1m9z...g_ROM.zip?dl=0

[CoopKill]

Does not allow d/l for some reason.

Check the plugs to see if actually rich? Has to be an injector, or an O2 sensor issue. Set Chrome to pull off one sensor, and see what it does. Or swap the sensors?

[DrGonzo]

Added a new link.

Checked the front plugs and they are all black so it is rich. So it's the entire front bank not a single injector. O2's are fine, cycled and worked normally before adding the new injectors. I can see them cycle if I give it gas, but once it idles back down the front goes rich.

[CoopKill]

Was Chrome in there before?

[DrGonzo]

Yep, I ran chrome in the car for a couple months with nothing but the proprietary bits turned off. Car ran great with stock injectors and stock 99 tune.

[CoopKill]

Front O2 is not cycling no where near like the rear. Even if rich it should bounce (like the rear), and not produce the same number. I am still suspect of the front O2.

[CoopKill]

IIRC if you set Chrome to read off one O2 it reads off the rear. See if that changes things.

[DrGonzo]

Front O2 is not cycling no where near like the rear. Even if rich it should bounce (like the rear), and not produce the same number. I am still suspect of the front O2.

I think that's because it is just that rich in the front bank. when I give it throttle you see the front O2 move so it's not dead.

IIRC if you set Chrome to read off one O2 it reads off the rear. See if that changes things.

Not sure what that is going to do. If it does read from the rear and the rear is working and cycling fine, what it that going to tell me about the front?

Funny thing is that even with it like this it idles fine, rev's fine and the WB is showing around 14.5 AFR as seen in the logs.

[DrGonzo]

Ok So I disabled "Dual Narrowband Fuel Bank Trim" and checked it with the injectors scaled to 550cc. Front trim is at -25 and not moving. Rear is rich at -15. Bumped the injector scaling to 650 and 750 and the rear is still sitting at -15.

After about 7-8 min of running it just randomly died....

Started it back up and the rear trim is not in the positive between +1-5 and slowly moving back into the negatives. WB reading between 13.5-14 AFR.

[CoopKill]

After looking at your log again it looks like your front, and rear sensor wires may be swapped on the patch cable.

Front reads rich at idle, the rear very lean. Stoich should be reading +/- .4? on the narrow. If the f/r are reversed the ecu thinks the rear reading is the front, and keeps adding fuel to compensate , and oposite for the front O2.

Might check the pinout for the O2's on the ecu. This is what happened with mine.