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Yes, I did see that was hoping to get fueling closer first, in case I need to drive to exhaust shop again.

Thanks I will look into that first.

I am starting to adjust the fueling on my genIV E38 ECU using this method. In my first log attached, the MAF is lean as I expected but the VVE is rich. Using the maths for VVE_CL, and MAF_CL. I did...

You may also need an intake temp sensor, as they are built into some MAFs

Another option is to use a clamp on exhaust bung, and use the down stream sensors.

Greg,

You packed so much useful information in this response thank you, I am beginning to understand past mistakes.

With E38 gen4 I added headers which moved the location of the sensor, where...

Hello,

Been reading, trying to tune my GenIV E38, noting how important steady state data is.

Can you log data, and apply a filter after? or do you have to have the filters set up while...

Oops! That page can’t be found.

Looks like tune was scaled for larger injectors but the AFR term was not halved

http://www.newcaprice.com/forum/viewtopic.php?f=17&t=3852

13 and older is different from 14 and newer

2014 Caprice 408 swapped lots more, but I hope to learn about fuel pressure info.

I have Fore innovations dual pump, with their controller installed, and now a return system with mechanical...

The data I used came direct from the injector dynamics site, i will review this to make sure I entered it correctly

Hello,

I have a severe knock retard issue, KR pulls ALL of the timing, and cannot get past 5000 RPMs.

its a E38 ECU has long tubes, no cats, mild cam, stroker 408 with ported heads, 10.6 to 1...