Right now I've got a full tank of 89. Any problems with switching down to the 87 now or should I just put the stock tune back in until I run dry.

2004 Ford F150 FX4 5.4L
DP# U7151

I'm running the 91 octane tune on 89. The truck seems to be doing just fine. Should I make any adjustments or leave as is. The 91 tune is the mid grade tune on the U7151 and in my area 89 is the mid grade fuel. So I'm not sure what to do really. Thank you.........

2004 Ford F150 FX4 5.4L'
DP#U7151

I have a K&N cai & an AirRaid helix style throttle body spacer.

Should I be all set running one of the stock octane tunes or will I benefit chaning some of the parameters?

Thank you for all your help, it's greatly appreciated.

ty

2004 Ford F150 5.4L FX4 Supercrew
DP # U7151

I'm having installed this weekend a K&N CAI, AirRaid throttle body spacer, JBA shorty header, complete true duel exhaust system with Magnaflo highflow cats and Flowmaster super40 mufflers.

To bring it all together I'm having a custom tune wirtten up to ...

If you're gonna have a custom tune written up, the truck's probably gonna have to be put on a dyno. Thats pretty much how they write them. Its almost impossible to get every aspect of a custom tune dialed in properly with out having it dyno'd. With a Diablo tuner in hand and the couple of mods you ...

What kind of headers are you going to be running?

As of now I've got a K&N F.I.P.K. which is just an expensive CAI, I also have an AirRaid helix style throttle body spacer.
Next week I'm having installed the JBA headers that have been collecting dust on my kitchen floor, true duel exhaust with ...

Once this update is released what will Diablo actually be changing or adding. As of now it works fine for my truck so I'm curious as to why one would be fixing something that doesn't need fixing

So I bought my 2004 Ford F150 FX4 with 41K miles on it. I didn't get a deal but I paid fair market value. The truck has all the bells and whistles, was owned and maintained by a certified Ford mechanic and was near mint condition. Truth be told I spent $24,500. After the transaction was over I ask ...

I second that motion.

A little off the subject but I need a house with a garage. Every time I want to work on my truck mother nature decides to take a dump on my plans. Gotta love New England. GO PATRIOTS!!!!!!!

Closed weekends ?!?! I understand even the people at Diablo need a day or two rest but how about getting a weekend crew in to hold the fort down. I'm sure the vast majority of people like myself work on their cars during the weekend and its pretty frustrating having to wait till Monday to get a ...

2004 Ford F150 FX4 5.4L Supercrew with 61k miles. DSP #U7151

Aftermarket mods: K&N FIPK/CAI, AirRaid helix style throttle body spacer, JBA shorty silver ceramic coated headers, MagnaFlow high flow cats, Flowmaster super40 mufflers, 2.5 inch exhaust.

Does my truck fall under mildly modified? Or ...

I'd like to hear from anyone and everyone who owns late model Ford F150 5.4L. Mine is an 04 F150 FX4 5.4L and am looking into squeezing out as much pony power as I can. Thanks

I'll probably answer you before you get a response from Predator. So far I've posted two questions over the last 3 days with nothing, all the while everyone else has gotten an answer. Seems like they're only interested in answering questions if you own a mustang gt. U7151 is the the DSP you should ...

I've made two posts over the last 3 days with no responses. Since then 11 other people have posted questions that have all been answered. I've entered all the information that has been requested of me. Year and make of the vechicle in which I'm asking about and DSP #. Am I forgetting something or ...