Supercharged111
Truly Awesome
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- Aug 20, 2015
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Not likely. If you can swap back to black box and make some of this **** go away then there's definitely something 411 specific ******* you over.
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The MAF reading wrong will affect fueling, which probably accounts for the +10% LTFTs - you need a new MAF curve most likely, but it could also be due to a dirty MAF sensor - I'll have more when I get back to my computer and can actually read this thread.
I cleaned the MAF and it didn't make any change, I was going to swap the sensor from my brother's 5.7L Suburban to see if something was wrong with mine, but never got around to it. I think @Mangonesailor said the cam position code is possibly related to the crank relearn code, he posted a couple replies up about it;
I believe the tune Lextech provides for the 7.4Ls is from a "built" 454 that has a lot more done to it.
Possible.. Can you do a relearn on the crank? Also, how does your distributor shaft gear look? If it's too badly worn, it'll throw off your CMP, and your timing.
Can you log cam offset? That should read 0 +/- 8 I think is the tolerance. Something to consider since you said this may have been a pre-existing issue. It's probably going to need a new Base Idle Airflow, which you can get by logging STIT (Short Term Idle Trim), but generally you need access to a tuner to disable the LTIT, because they'll throw off your STIT. Idle timing does probably need to be knocked down a bit as well, 23 is a bit hot for in-gear idle. 17 to 20 is about right.
By chance does your logger have bi-directional capabilities?