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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#1
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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!!! |
#2
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The formula uses the number you put in the programmer. So it'll be mm.
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![]() 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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#3
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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!!! |
#4
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After looking around some websites, it looks like that one doesn't have it.
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