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| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#1
Fri, March 26th, 2010, 03:42 PM
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Just keep in mind that the gryphon programmer is always going to be a little off no matter how accurate the tire size and such are. An easy way to see this is to watch the average economy guage while driving like your racing. From a roll of about 30, floor it until you hit 70. Then let off the gas and watch how fast the average climbs back up until you get back to 30. I've gotten my average to say over 30 by doing that. In reality driving around by flooring it then rolling is not going to improve your economy.
 For accurate economy you have to still use the pen and paper when you fill. The average really isn't accurate until about 10 or 20 hours worth of driving. I'm kinda curious about what your thinking of using the MAF for. With that I think all you can get is the amount of air going in and with some calculations an estimate of fuel going in at a given rpm/% engine load.
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#2
Fri, March 26th, 2010, 04:52 PM
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ok thankx for the added info. also, what format of tire size should be entered into the above formula (mm,in.)
as far as the MAF i was just curious because i didnt know what g/s meant until you explained. I am still learning everyday abt this stuff but i happened to stumble upon another formula in the manual ....i think it was to calculate LOAD, but it involved MAF flow. As i learn more i will use it to help diagnose a recurring DTC im getting within the last wk or so. Its DTC p1151, hasnt came on since i got the gryph but it will....lol. i dont wanna have fuel/air issues cause that will throw off my economy. when i did have the MAF view on display it was breifly but the g/s value seemed to be searching...my RPM was also dng this. This weekend i plan on doing a good throttle body,IAC clean but could this instability of MAF flow signal a bad MAF cause that is a probable cause of the p1151... thankx alot for ur help.
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1999 f150 4x4 - Flowmaster 40 series exhaust - 33" BFG M/T km2's - PHP Gryphon Programmer - RotorPros Slotted rotors - Mag-Hytec Diff Cvr Let's go Wheelin!!!
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#3
Fri, March 26th, 2010, 06:52 PM
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The formula uses the number you put in the programmer. So it'll be mm.
Quote:
 Dont worry, stuff like the RPM and MAF are never steady. They are always fluctuating. Now if there is 50-100 rpm difference then there might be a problem. If you really want to learn about each of the PIDs you can use the data stream option while driving to record what you would usually see on the display. You can select 5 parameters for the gryphon to record. This will give you an idea of how the different parts of the truck react with each other while driving. Here is a link to a post I made a while back where I attached my data log instructions. http://forum.gopowerhungry.com/gryph...html#post23135
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#4
Mon, March 29th, 2010, 02:14 PM
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that was a good write up and i looked forawrd to using the data stream capabilities after seeing it in pegasus...but it looks like you can only do this with 04+ gryphons? is that right?
my diagnostics menu only shows retrieve DTCs Clear DTCs Tech support ....those were useful threads though. thanks
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1999 f150 4x4 - Flowmaster 40 series exhaust - 33" BFG M/T km2's - PHP Gryphon Programmer - RotorPros Slotted rotors - Mag-Hytec Diff Cvr Let's go Wheelin!!!
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#5
Mon, March 29th, 2010, 03:27 PM
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After looking around some websites, it looks like that one doesn't have it.
 I dont think the diesels have that ablilty for the 1999 and some 2000 for the Edge programmers either.
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