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Perhaps I'm not making myself clear, or possibly a reading comprehension issue is occurring here.

I ran a datalog with the maf enabled, I was concerned with the accuracy of the MAF reading.
I...

ATM I'm tuning speed density with MAF disabled, but after that, I suppose that is the next step.
the AFRvs MAF value suggests that the MAF is reading ~23% low, which is pretty far.
I don't...

That is 100% not what I'm saying at all. I recognize that it was lean. I have no intention of doing WOT pulls with the engine lean. I simply wanted to know if 30 lbs/min seems lower than it should. ...

Still no wideband, but I made an Excell spreadsheet to calculate all the VE changes. I'm data logging with a filter of 25 samples, so it should be relatively accurate.

here is the 128496 128497...

I just added 12% across that entire section. ill get a log posted some time next week.



thanks for the info. sorry, i miss spoke my wideband wont show up natively. I guess i need to order the...

ill target 12.5-12.7 at WOT, but I'm not going to do that until I know the MAF readings are reasonable.

Hey guys, thanks for the help on the last thread!
I'm starting the tuning process on my Astro van project. I have noticed that the MAF values seem a little off. The tune is pretty far from...

So, i have a mildly built 6.0 with a jakes stage 3 4l80e with a 25-2700rpm stall that shifts VERY quickly into 4th and won't upshift unless you really step on it. as an example, 35MPH 25% TPS and...

thanks man, given the similar load/rpm Conditions my MAF readings tend to be ~10-12% lower. Its not an apples to apples comparison, but its something.

If you have a log of a WOT pull that would...

I was wrong; it's definitely an issue with the injector two wiring. Going to either replace the pigtail or just rewire it entirely. No big deal, easy fix

Thanks for the help guys, I seem to have it sorted out. bad sparkplug wire that wouldn't fully snap onto the plug. it would fully snap onto the spark tester though. explains the intermittent...

I am familiar with them. I do not own one

12v to all injectors, noid light also confirms injector 2 is receiving the signal.
when injector 2 is unpluged or disabled in VCM scanner, the misfire is noticeably worse.

Wiring to the coils...

post a log when you get the chance, its a similar setup to mine and I want to compare some numbers if you don't mind

the cost to upgrade is $250. and logging the WB is not the concern of this thread.

I looked at the log again, and it seems when in closed loop is when it misfires. now, im not sure if the misfire...

im runing the MPVI2, no pro Link. so, that doesn't help unfortunately.

let me know, im very intrested

That kind of sucks, i was under the impression that the obd2 interface acted as a separate "PCM" In vcm scanner, and as such, was functional regardless of what pcm it is connected to. Any easy...

Hey guys, this is my first post. I've used the resources here for a few years, though.

Im having hell keeping my LS swap happy and chasing unknown issues, particularly with an intermittent...