P01 and P59 Basic Speed Density Settings/Setup.

In this thread will be just the basics for setting up a speed density tuning using the most recent software HP Tunes has out. That being 4.0+ and then specifically being the 4.4 version.

I have taken some screen shots of how you can setup the tune to run in speed density on just about any P01 computer and P59 computer. Most commonly found in Camaro/Firebird/C5 vette, as well as 99-07 Silverado/Sierra trucks and the 2003-2007 P59 vans like the express and savanna van.


It's very simple and straight forward to put the computer into speed density only. This first post is the few settings it takes to fail the MAF sensor in the calibration. Like for example you removed the MAF sensor or you need to fail the MAF to calibrate the VE table(s).


I am using a 2006 GMC Sierra file for use in these screen shots.



**Please note that not every calibration is exactly the same, there might be slight difference between early P01 calibrations and the later ones. Some things might be labeled in different wording but overall this should cover it and shouldn't confuse anyone.**


First, open you file and make sure you are in "Advanced View" under the edit tab to see all tables in the calibration.

Go to ENGINE DIAG tab, find the MAF fail freq high and set it to 0hz. Then click the DTC's page and uncheck the SES box if you wish and set all 3 MAF DTC's to MIL on first error. Click each code to present the drop down box to change the error mode. I've seen people use "No MIL Light" aswell but it shouldn't make any difference. The idea is to trip the code straight away, you should have a P0103 present if you read the trouble codes.


Attachment 90867


Attachment 90868





After those changes it should be setup to run in speed density without the MAF enabled. There are further steps in the next post that will go talk about setting up the tune for open loop speed density.

Like if you are going to use a wideband o2 sensor to calibrated the VE table without fuel trims and closed function.




I don't think this has to be said but after the changes, save your changes under a new name to keep track of what you are doing. Do a write calibration to the computer and you should be up and going.

Part Two.


Okay, so now you want to run speed density but without o2 sensor functions. This would be required if you completely removed the o2 sensors or you need to tune using a wideband o2 sensor without o2 sensor control.

We will be disabling closed loop o2 sensor control here as well as your trims.

Go to Engine > Fuel > Oxygen sensor

You will be setting the Closed Loop Enable table to anything really high, something not possible to see with coolant temps. An easy number is 284, or the max value.

Attachment 90869







Change the Long Term Fuel trims min ECT enable settings to 284 as well. This disables the LTFT.

Attachment 90870








Now one tab over at Open Loop/Base. Disable the Short term fuel trim drop down.

Attachment 90871

A few more random things to note. In some calibrations the Open Loop Eq Ratio will have values of less than 1.00 at operation temp.

In this table 1.00 means stoich. You want the computer to only command Stoich at operating temp and not swing the fueling on you. So have all cells above 140 degrees coolant temp set to 1.00.

Like so.

Attachment 90873




Another thing you want to turn off is the COT or Cat Over Temp Protection. This table could change the commanded fueling on you at random. You'd want this disabled for all tuning and if you are removed the cat converters from the vehicle. It's just another small change to make sure you have no other issues.

Engine > Fuel > Temp Control.

Attachment 90874

This would be a good sticky. Very common questions asked here alot. And common for people to start tuning MAF or VE but not be done set up correctly.

Also in P01 ( all ive used) set the high rpm disable in the dybamic airflow table to 8000 for VE or somthing very low like 100 rpm to run MAF correct?

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Originally Posted by anniversaryss

This would be a good sticky. Very common questions asked here alot. .

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still good, few years later..