High load misfire

[jlaudio11]

Setup is 2020 Camaro twin turbo, L8T crank, texas speed forged piston and rod, btr stage 1 cam with 38% fuel lobe, stock LT1 hpfp and injectors, aem 400 aux pump tying into factory line, deka 80 port injectors controlled by reflex plus controller.
Ive been chasing a lot of different things but recently started noticing issues with misfires in the higher load and boost. Looking at old logs there have been some but they've gotten way worse recently. Attached is a log of a pass at the track yesterday. I was hoping to get an 8 before the end of the year but that doesn't look like it's going to happen. I can take the engine apart and I probably will anyway just to go through it but I'm trying to figure out the actual cause before I do, put it back together and have the same issues. The main things I have done so far is, new plugs ltr7ix gapped at .022 and new ac delco wires. I've also been trying to throw more fuel at it. Tell me i'm an idiot, tell me i'm doing it all wrong, i don't care as long as it get's me closer to figuring it out.

[GHuggins]

I just glanced at the log. You're extremely lean (possibly torque management killing it) and bank 1 sensor 1 O2 not working - appears unplugged.

[jlaudio11]

I just glanced at the log. You're extremely lean (possibly torque management killing it) and bank 1 sensor 1 O2 not working - appears unplugged.

Bank 1 sensor 1 has seemed fine, bank 2 sensor 1 has had some delays in it that made me think it was going bad. What do you mean by torque management killing? Like torque management is trying to pull fuel out in an attempt to bring torque down? I havent really experienced that, more timing pull and/or throttle closure.

[GHuggins]

Confused, is this not the log you posted? Wrong log? DTC's show bank 1 sensor 1 issues too.

dead o2 and lean issue.jpg

[jlaudio11]

Holy cow, I'm so sorry. I accidentally uploaded a log from a complete different vehicle from a year ago. I updated the original post with the correct log.

[GHuggins]

That makes more sense. Hard to tell the cause though as there are several things off in the log. DD is showing to be anywhere from 15 to 101 % off for the negative in places - this will cause it's own tm issues. VE is showing to be 11% rich where it's having the issue, but then 45% lean higher up. It's also very lean around idle. Max engine torque allowed drops with rpm and looks low in general and is way under delivered? Torque model possibly off and if nothing else off due to incorrect fuel calcs?

Says I'm not authorized to open the tune file. I guess because I'm running too old of software or locked or whatever?

[Josue Galban]

Setup is 2020 Camaro twin turbo, L8T crank, texas speed forged piston and rod, btr stage 1 cam with 38% fuel lobe, stock LT1 hpfp and injectors, aem 400 aux pump tying into factory line, deka 80 port injectors controlled by reflex plus controller.
Ive been chasing a lot of different things but recently started noticing issues with misfires in the higher load and boost. Looking at old logs there have been some but they've gotten way worse recently. Attached is a log of a pass at the track yesterday. I was hoping to get an 8 before the end of the year but that doesn't look like it's going to happen. I can take the engine apart and I probably will anyway just to go through it but I'm trying to figure out the actual cause before I do, put it back together and have the same issues. The main things I have done so far is, new plugs ltr7ix gapped at .022 and new ac delco wires. I've also been trying to throw more fuel at it. Tell me i'm an idiot, tell me i'm doing it all wrong, i don't care as long as it get's me closer to figuring it out.

I understand that you are somewhat lean commanding a fairly lean mixture putting in almost 14psi, I see that you are with E85 this is not a reason to run commanding something that lean, improve your AFR levels give it more fuel you need to be richer

[Josue Galban]

Setup is 2020 Camaro twin turbo, L8T crank, texas speed forged piston and rod, btr stage 1 cam with 38% fuel lobe, stock LT1 hpfp and injectors, aem 400 aux pump tying into factory line, deka 80 port injectors controlled by reflex plus controller.
Ive been chasing a lot of different things but recently started noticing issues with misfires in the higher load and boost. Looking at old logs there have been some but they've gotten way worse recently. Attached is a log of a pass at the track yesterday. I was hoping to get an 8 before the end of the year but that doesn't look like it's going to happen. I can take the engine apart and I probably will anyway just to go through it but I'm trying to figure out the actual cause before I do, put it back together and have the same issues. The main things I have done so far is, new plugs ltr7ix gapped at .022 and new ac delco wires. I've also been trying to throw more fuel at it. Tell me i'm an idiot, tell me i'm doing it all wrong, i don't care as long as it get's me closer to figuring it out.

It doesn't let me see the file either, make it work for us, to give a good opinion about this

[jlaudio11]

The biggest change recently has been swapping the stock converter for a circle d 3600-3800 unit and it has been difficult to dial in. Just before this pass, i threw +10% at the maf curve and turned on lambda correction in the reflex plus port controller just trying to get more fuel in it to see if that would help. Looking back the lambda scaling in the reflex plus was off and it was actually pulling some fuel out of the port injectors correcting up top. I have the port injection "hidden" differently than most, I have the fuel pressure multiplier for the high hpfp zone maxed out, basically saying it moves more fuel in that area than it actually does. What got me here was getting a flashing engine light, reading it and seeing misfire codes. I cannot feel it or hear it going down the track. The tune is not locked but is on the latest beta.

[1scls1z]

Check plugs and make sure one isn't cracked?

[jlaudio11]

Put new plugs in before this track day and didn?t really change anything

[edcmat-l1]

Miss looks like it's on bank 1. Most common causes are cracked plug, boogered up wire, or wire not snapped on coil or plug well enough.

And it looks too lean but that probably is not the cause of your miss.

[TheMechanic]

Pull the wire and idle it. Put it an inch or so away from the head and see what kind of spark reserve you have on the cylinder that is misfiring. It should be in your freeze frame data or you can see it in history misfires. Compare it to another. If in doubt pull the coil, wire, and plug and put each one of those components in different cylinders. Depending on what cylinder the misfire goes to will tell you what component failed.