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Yep. It was a fuse. Those 2 coils are on a common fuse with O2 sensors. The O2 sensor got crimped during transmission install which caused it to pop the fuse.

After more troubleshooting, it looks like the coils on 2 and 4 aren't firing. However, when they move to new locations, they fire fine. I don't believe the wiring is the issue, so I guess the ECM...

2019 L86 with 10L80

I replaced my transmission over the weekend and went for a test drive. Everything was fine, and drove great. I live about 20 minutes away from where I was working on it, and on...

I'm currently running a 10L80 transmission in my swap, but I have had two separate transmissions each having pump issues. The first one had the idler gear come off the bearing in the front stator...

The transmission that I bought paired to my engine from a salvaged Yukon was having issues, so I decided to swap with a reman 10L80 directly from GM. The tech told me that I would need to program the...

I misunderstood what you were saying in the previous post. I thought you were saying if the Lambda was .87-.89 before hitting PE then you should be good to start tuning PE.

If you have the stft enabled won't the ecm attempt to adjust the lambda to 1?

Are you trying to tune for speed density or tune the MAF? If you're trying to tune to MAF you need to leave the MAF enable.

Here's a good video to watch on MAF tuning. If you do it this way watch...

So, I did a little more research and all of the part numbers match what was in the donor cars.

I've replaced the pigtail at the APP and still have the issue.

The last 3 things is could be are...

They all match the donor vehicles part numbers and are all GM parts, not off-brand from the parts store.

Answers in line below in red.

2018 L86 with a 10L80. I Keep randomly throwing a P2135 check engine code which puts the engine into limp mode. I recently noticed that the fuel trims will go between 10-14% lean. I've checked all...

I have been subscribed to Goat Rope Garage for a while. I used that video you posted to get it dialed in. I ended up buying a wideband to get it fixed up. Everything is good other than when the A/C...

I broke down and bought a wideband to get my MAF dialed in. The fueling is dead on when I'm cruising around. That is until I turn on the AC. When I'm actually moving, it's only slightly lean, but...

Thanks! I'll give that a shot. Going to do some research and see what those setting do also.

Once I'm back from vacation I'm likely going to look for a different area to route the air intake and...

The air intake has a 90 right off the TB and then an intake tube that goes over to a similar area of the stock airbox, but has a K&N filter on the end of it. Not much room to work with as far as...

I have a 2018 L86 with a 10L80 in a Wrangler. I'm new to tuning modern cars, so bear with me.

When I drive around, my LTFT seems to jump around quite a bit. When I stop at a red light, they will...

I purchased an L86 and 10L80 combo out of a Yukon Denali that had just under 25k miles on it.

I have a terrible whine in my transmission until the TC lockup occurs. It only does it while the car...