2005- F-150

[uga_bulldog_25]

Hey i have the f-150 with 5.4L and the u 7151 with the new firmware 9 verson I was wondering what kind of of % should my fuel pump be putting out at WOT my truck feels like its starving for fuel at about 3500 to 5200 could my pump be getting weak? I've logged some data for my FP,FLI,FRP the FP is hitting 30% at wot and the FLI about 85-100 and FRP about 38 to 40Psi and truck runs great up 2 that rpm range

my truck has several mods 3inch flowmaster exaust,Helix power tower,K&N filter,Jet mass air sensor and getting plenty of cold thanks 2 my home made additon 2 the factory intake it stays with In about 2 degrees of out side temp.


I was also wondering how 2 use the new up shift feature and get some insight on what the MAF curve does thanks

[concoursd]

the MAF curve adjustment is an advanced feature used to help dial-in the fuel and timing when you change MAF sensors.

Since you changed to a Jet MAF, then you may want to tinker with that. I dont recommend changing MAF sensors without a custom tune but it really depends on the MAF setup.

[mikel]

Yeah, Id recommend a custom tune for that MAF sensor.

[concoursd]

the reason mikel and I are saying the MAF sensor swap should be retuned is because the MAF is used for about 90% of the fuel and spark timing calculations made by the computer. So, if the MAF is sending inaccurate information to the computer or if the computer is calibrated for the new MAF, then you probably are leaving some performance on the table and even some driveability.

[amsounds]

To add to the diagnosis, Change the fuel filter every 5000 miles and you should resolve the problem there!
change the MAF to 10% + or so until you get the power back!

[uga_bulldog_25]

yeah she feels much stronger now that a fooled with the mass air table i'm still trying 2 dial it in from the +10 to +20 mark trying 2 find the right # it is reving so much quicker feels pretty good still kinda lags around 4500 to limit like some thing is still missing like it may be 2 lean any suggestions on mybe riching it up some. Thanks

[jj]

uga bulldog,
did ur truck through codes before u messed with the MAF?? I HAVE A SIMULAR SET UP AND WAS WONDERING IF UR TRUCK WAS ALSO THROUGHIN CODES- TOO LEAN ON BANKS ONE AND TWO???

MIKE,
IF I SEND U A DATA LOG CAN U TAKE A LOOK AT IT PLZ AND SEE WHAT AND IF IM DOING ANYTHING WRONG? I JUST UPDATED TO THE 9R06 AND UPLOADED THE K&N 87 TUNE. I HAVE A 5.4L FORD F150 WITH 3 INCH MAGNAFLOW AND AN AIR FORCE ONE CAI. IT HAS A K&N FILTER ON IT AND WAS WONDERING WHAT IS WRONG? I DID ADD 5% TO THE MAF AND SEEMS BETTER. I DONT WANT TO ADD TO MUCH JUST IN CASE I MESS SOMETHIN UP...

THANKS FOR UR HELP..