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Now that I know I can raise the P0068 enable RPM, I'll continue what I was doing, as I was making progress with the MAF errors using the DynAir method.

After getting a stable drivable tune for my LC9 to L96 swap, I am working on getting the MAF curve dialed in. The stable tune v19 is extremely lean. After logging data from that tune using Cringer's...

Since I am a dummy, I didn't re-disable DoD and Flex Fuel on the last run, which is why it ran so poorly. With that fixed, the drivability issues I'd been having are gone. No startup flare, no...

Did you get a chance to look at the most recent log?

Take 2, waited longer for the oscillations to die out, then went for a short drive around the neighborhood.

OK, so I went all the way back to the as-found tune from the 5.3, changed the displacement, and copied over all the injector parameters from the 6.0 tune. No startup flare but the RPM started...

Thanks for looking into it, I will give that approach a shot. I've been taking more stabs at this lately and reading into logging MAF and VVE data simultaneously.

Working on the MAF side of this. I've made a few iterations of logging LTFT once warmed up and applying those changes back to the MAF curve. On the last iteration the engine started running rough...

OK I have been chipping away at this and made some progress. The cold start flare is less pronounced and the overall drivability is better, but I am still getting really high LTFT's in normal...

I smoked it again just downstream of the MAF sensor and didn't see a hint of smoke anywhere. I also ran it off the brake booster hose and got nothing.

While I was in there I checked the MAF and...

I put a smoke machine on the intake already and didn't see any leaks, and I sprayed around with carb cleaner and got no RPM response. I'll try smoking it again.

I tried this tune (6.0 Swap Truck.hpt) and the RPM surge still occurred on cold startup. Drivability was not good either, downshifts were rough and it wanted to roll a lot faster with my foot off the...

Cool, I'll give it a try. I still have the stock electric fans. What fields are you referring to for the MAF curve and gauge setup?

Resurrecting this after a long time. Two logs are attached - one from January 27th where I was able to get it to stall when shifting from park to drive, and one from March 26th that shows the startup...

I'm jumping with a wire between 30 and 87 on each relay.

My problem seems to be that when high speed is commanded, only the right side fan runs and the left side fan stays off. That seems wrong...

Since the behavior was the same when I jumped the 3rd relay, would that indicate an issue with the left side fan?

Fan diagram attached.

(2011 Silverado 1500)

When I jump the low speed fan relay, both fans run at low speed. When I jump the high speed relay, only the passenger side fan runs at high speed, and the driver side fan...

Upon review I noticed the alcohol composition was reported as 47%. Since I only run gasoline I disabled flex fuel and reflashed. After idling for a few minutes the LTFTs swung positive. Does this...

Stock 1500 exhaust.

Stock L96 injectors. Tune values for injectors are from the stock L96 tune, right or wrong.

Stock L96 intake from the donor truck.

I have checked for vacuum leaks a few...

I swapped an E38 L96 6.0 into my 2011 Silverado 1500 (also E38) and copied over the applicable parameters from a stock 2500 / E38 L96 tune. On cold starts in warm weather the idle RPM overshoots...

Still working on this issue, any help is appreciated.

I've also noticed some hesitation / slight stalling after cold starts at low speeds in gear, especially reverse. Related issue?

Am I going to need a more advanced scan tool to figure out which of the MAP performance tests are failing that are triggering the code?

12711681.

Key on, engine off, MAP and BARO both read 98 kPa.