[LQQKOUT]

Why is it pulling timing across the board in 4th? 3 runs similar results.
Running E50 with water/meth on top. IAT, fuel looks good..... any inputs?
Also STFT 1 and 2 seam to be 10% off from each other.

http://datazap.me/u/lqqkout/log-1443...10-11-12-13-22

[csu87]

How many miles on plugs, coils and injectors?

When was your last walnut blast?

[C.Pop]

Try resetting your a/f learning via BT or INPA and relog. Charge temps look great, fuel pressure looks good, I prefer a little richer myself for that timing and boost and/or more ethanol. Try resetting A/F learning first -that can mess with stuff, or of course the standard plugs/coils looking.

[LQQKOUT]

Plugs have about 2K on them, walnut blasting was done at the same time, Bank 1 has all new -12 injectors. Coils might be weak. I'll get 6 new ones and see if it helps. A/F, octane...was reset using MHD 200 miles ago. I was going to switch #4 coil with another one to see if the timing issues moves with it, but my concern was the timing being pulled at the top end on all cylinders.

[csu87]

could also be the gas you are using. try adding another gallon of e85 and see if that clears it up. Also, do a 3rd gear log starting at 2k ish RPM

[LQQKOUT]

There are multiple 3rd gear logs in my datazap. Most of them are clear. The major issue is top of 4th.

[C.Pop]

Increase your ethanol percentage.

[LQQKOUT]

I'm running an E40 tune on E50 plus 80% meth. I would think it should be enough. I got new ignition coils on the way to see if it helps. I might have to close the gap in the plugs if that doesn't help. I think they are at. 028 right now.

[ferocity02]

STFT's are getting close to maxing out. I think 35% is the max. This is probably because you are running E50 with meth. Have you tried without injecting water/meth?

[LQQKOUT]

Usually they are at -34% on E40, after going to E50 they got a bit lower.

[ferocity02]

Originally Posted by LQQKOUT

Usually they are at -34% on E40, after going to E50 they got a bit lower.

Oh you're right, I guess that makes sense. More ethanol in the tank means less energy in the fuel, so it needs to inject more fuel in order meet the desired lambda, which means higher STFTs. But you're injecting additional fuel via meth so it needs to reduce the trims to compensate.

Do you get the same corrections when running closer to E40?

[LQQKOUT]

STFT are maxed at - 34% on E40. Timing corrections I'm not sure, usually I do 3rd gear pulls and don't see any noticeable timing corrections across the cylinders.

[ferocity02]

My trims are also very negative when running the E40 V5.1 map, not quite max though. I think the fuel scalar in the map needs to be adjusted.

[C.Pop]

Originally Posted by LQQKOUT

I'm running an E40 tune on E50 plus 80% meth. I would think it should be enough. I got new ignition coils on the way to see if it helps. I might have to close the gap in the plugs if that doesn't help. I think they are at. 028 right now.

.028? That could be an issue lol. I'm at 0.022".

[LQQKOUT]

I'll pull them out and double-check. They are either at 028 or 025

[LQQKOUT]

New coil packs, NGK spark plugs have around 2K miles on them, gaped at .022, brand new -12 injectors or cyl 1-3, E50 fuel and 20/80 water/meth.
Fuel, octane, reset. Still getting timing drops acres the board. What's next?
OTS MHD E40 map.

http://datazap.me/u/lqqkout/new-coil...10-11-12-13-22

[LQQKOUT]

I think I'll give one of the SPXXX tunes a try next see how they do against the OTS E40 tune.

[WedgePerformance]

From what I can tell this map is running very aggressive on your car. Trims are more negative than normal due to the meth more than likely, but could be due to your ethanol content not being high enough. Meth could also be causing the spread in the trims as one bank is using more fuel than the other. Your corrections are minimal and only two cylinders.

I'm leaning toward the ethanol content. Have you tested the % at the station? How much are you mixing? Considering your HPFP / LPFP are perfect, increase the ethanol % to 60. As you increase your ethanol content, more than likely the corrections you currently have will go away.

[LQQKOUT]

Wedge thank you for your input. I tested the fuel in the tank at E50. I'll try adding some more E85 to it. Even without meth my trims are off from each other. I might have to put some new O2 sensors in there.

[sk55]

Precat o2 sensors. Could be an issue. Those damn thing are so expensive. I paid 650 for 2. To solve my misfire issues.

[LQQKOUT]

Where did you get yours from? I assume that was installed price. They usually run $125 EA

[sk55]

I just got at the dealer.
My mechanic said get it bmw
Since I had tune and those things measure Afr.