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Author Topic: I need help, bank fuel trims off please help me trouble shoot  (Read 14360 times)
spacecadet
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« on: February 28, 2017, 08:32:58 PM »

no logs because I'm scared to do a pull with this going on

adaptation( idle ) bank 1 sensor 1:-1.7%
adaptation(partial) bank 1 sensor 1:14.1%

adaptation( idle ) bank 2 sensor 1:-0.8%
adaptation(partial) bank 2 sensor 1:6.3%

Banks are out.

set up:
single turbo pte5858, ID 725's, walbro 450, 2.8 heads, 2.7 block. stock fuel rail and fpr.

I have:
-pressure tested
-smoke tested
-replaced bank 2 02 sensor
-swapped injectors from bank to bank

thoughts:
Tomorrow I'm going to swap 02's to see if it follows. Also wondering if maybe the stock fuel rails/lines/fpr might be to blame so thinking of swapping back to the stock pump also

I need:
More input or thoughts on what to look for or check. Anything is appreciated. I'm a bit lost as what would be causing this.
« Last Edit: March 01, 2017, 07:14:09 AM by spacecadet » Logged
nyet
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« Reply #1 on: February 28, 2017, 10:17:49 PM »

Fuel pump, filter, FPR
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spacecadet
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« Reply #2 on: March 01, 2017, 07:03:00 AM »

Appreciate that. I'll test those out today hopefully one at a time.
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spacecadet
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« Reply #3 on: March 02, 2017, 02:50:33 PM »

filter replaced
o2's swapped
fpr swapped
issue persists. I'm sure I've F'ed something up sigh
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nyet
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« Reply #4 on: March 02, 2017, 03:07:32 PM »

Only thing left is MAF..
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vwaudiguy
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« Reply #5 on: March 02, 2017, 03:08:56 PM »

Only thing left is MAF..

He has a large difference from side to side.
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spacecadet
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« Reply #6 on: March 02, 2017, 03:40:41 PM »

Out of pure frustration I was manually moving through every block in the engine tab hoping to find something that would help me.

Nothing really until I hit block 093.

bank 1: 2, bank 2: -9  or vice versa i cant, quite remember.


I don't understand how these got off that much, I used a crank lock pin and cam lock bar so who the hell knows.

I have found a few other threads where people have had similar issues where they just pull the valve covers, pop the cam gears, and vice grip the intake cam into position.

I'm currently working on doing the above. Who knows anymore.

As always i appreciate any input.
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vwaudiguy
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« Reply #7 on: March 02, 2017, 03:53:40 PM »

I don't understand how these got off that much, I used a crank lock pin and cam lock bar so who the hell knows.

Did you crack the sprockets loose? Need to do that. They are held in place by conical tension. No woodruff key.
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spacecadet
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« Reply #8 on: March 02, 2017, 03:55:55 PM »

yea loose sprockets bar on, set timing, tighten sprokets, hand crank twice.

I must have messed something up though. or maybe because my tensioners were without oil pressure for so long due to rebuild that once they primed up they shifted drastically.

Either way we will see if this helps, i sort of doubt it.

Also hope i did not bend valves Sad
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spacecadet
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« Reply #9 on: March 02, 2017, 07:56:21 PM »

Welp I successfully moved it from -9 2 to -8 3 smh
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nyet
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« Reply #10 on: March 02, 2017, 08:08:38 PM »

He has a large difference from side to side.

They're *both* crazy lean, regardless of the difference...

If something is that awry, the trims might react asymmetrically even if there is a problem that affects both banks.

Do you have before/after logs you can compare?
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
armageddon
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« Reply #11 on: March 03, 2017, 01:44:18 AM »

Could be the position of lambdas on exhaust?
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spacecadet
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« Reply #12 on: March 03, 2017, 04:27:08 AM »

my o2s are where the duct tape squares are in this picture. A bit hard to see. I would think those would be ok, not sure of anything anymore though.
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4ringpieces
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« Reply #13 on: March 03, 2017, 06:57:59 AM »

Did you smoke test the exhaust or just the intake?

Leaking exhaust before 02 needs ruling out
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spacecadet
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« Reply #14 on: March 03, 2017, 07:37:03 AM »

no smoke test exhaust but i did put 10 psi into the tail pipe then moved my hand all around the up pipes to feel for air, soapy watered everything. Nothing. With the wrap on there though maybe i missed it, I might try to smoke test it once i get the timing fixed. last night i moved it from -9 2 to -8 3. sigh
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