EFIDynoTuning Forum

Just checking in to see if this is the right histogram to use for LWFM table correction, as well is there any calibration changes that need to be implemented first before correcting this table such as disabling KAMRF, tuning in CL or OL, unplugging the maf and having it failed to populate the histogram, making sure the MAF is dialed first and trims are working well? Populate as much of the table as we can and then smooth / interpolate any cells that we can't hit ?

thats the table u want running average

nope no cal changes.

you should never disable kams nor force open loop nor unplug the maf

Awesome, I'll go see what I can populate with it. Is there a way to to use the copy of the whole histogram table and then apply the correction to the whole table in the calibration like in HPT Vcm Suite where we can copy the whole table and then paste special multiply by half or % to the calibrations table. I didn't see a function in TP to be able to apply the correction to the whole table, but may be missing something.

Nope the histogram is larger than the table for a reason as well so u get more resolution and can humanly see the trend better

On the dyno trying to hit some of these cells and keep them populating for a few seconds, tough to do and the engine sure wants to get hot being warm up here atm!

What is the general consensus with this first table I populated. Multiply some of these values in certain zones per say and try to smooth it all out.

I played with this today and the histogram works great! Applied the corrections in certain cells / zones and then repopulated the table with positive results! Def a little tough as I still don't know how to use the interpolate and smooth functions of TP.

Excuse my ignorance but what does the LWFM table do?

Correct me if im wrong but from my understanding if the maf fails then the engine will keep on running using the load values in the lwfm table. Load value = an air mass and the ecu calculates fuel delivery based on that. On 2002 + strats they started using the lwfm table for transient fueling to help predict fueling. When you tip into the throttle the eec references the lwfm table first and then the maf to help with fuel calculations, so it's important to have it somewhat dialed in which in turn should net smoother running conditions, Pretty much a VE table.

Very good information!