truck running lean now
 

My CEL came on today after installing a JLT CAI and the gryphon a couple days ago, I changed the muffler today. the code is P0171 and P0174 which it says is running lean. Help please.

You have custom tunes on the way, or are they already installed? I know Bill can clear that up with a tune (if it's due to the CAI). I don't have the CEL's memorized, so it could be something else. These F150's are notorious for that with a CAI, they actually come from the factory running a little lean.

I already have the tunes, and it just came up days after i got them

We'll need to make a change to the MAF table. Unfortunately, since we've not done the JLT CAI kit before, I had to take a bit of a guess on how far to go. I would have much preferred to have dynoed that kit with AFR numbers, but that was obviously not a possibility at that time. :(

Outside of the lean issue, how has the truck been running? Have you noticed any hesitation? Surging? Rough Idle? Just want to make sure we get everything covered.

In any event, I will get you new tunes as soon as I get back from Tennessee and get the issues corrected. Give me a call on Monday so we can set up something for you.

Take care and have a good weekend.

Aou still up Bill? Well no hesitation, everything had been good i did took out the muffler today and went to the auto store to get another muffler on the way back was when the CEL came on. after I installed the muffler I turned the codes off than took it for a spin came back and checked and they are there again but no CEL. Two days ago I went to Alabama to pick up a boat for mly sister with the stock muffler and everything ran good, exept a slight almost unnoticeable cough while depressing and pressing on the gas pedal, but no CEL til today.

The slight cough might have been an indication of a slightly lean condition. This was most likely exaggerated by the installation of the muffler to the point it is causing the CEL. Like I said, a quick change to the MAF tables should clear all that up.

Cool, thx Bill I feel a lot better inside now. I will be available at your earliest convinience, I'll call you on Monday at noon. Have a good weekend and be safe out there on your trip.

Will do! :2thumbs:

How do I download the new tunes? I have downloaded Pegasus already, what comes next? Thanks

When Bill tells you the tunes are ready, start Pegasus, plug your Gryphon into the PC, and then click on Updates -> Targeted Functions.

You should also download the Pegasus manual from PHP's website. It has some important information regarding using Pegasus with Vista, for instance and some other good information.

- Jack

thanks Jack

Jerzpilot glad your liking the JLT and Gryphon i been watching your threads to see hows it going so i know what to expect. Looks like your the ghinny pig here and hopefully when i get my Gryphon on Friday it will all go in smoothly. i will have to wait for my custom tunes but that's ok.

Also i want to toss a shout to Jack i hear your from Tucson? Thats were i grew up man. Mom lives near Speedway and Kolb on the est side of the wash and i used to live all over but most recently Grant and Alvernon is a little house while i was in school before i moved to OR.

Small world, eh? We're further east, out near Tanque Verde Rd and Houghton.

- Jack

Yea thats pretty fare east but nice properties out there. I used to work for Cox Cable while i was in college and i used to work only the East side. I was there back when we were launching the fiber lines and i used to do primary high speed internet stuff.

Love it out there. But i cant say i miss the 90+ days off 100 degrees every summer lol

[QUOTE=mmandley;6558]Jerzpilot glad your liking the JLT and Gryphon i been watching your threads to see hows it going so i know what to expect. Looks like your the ghinny pig here and hopefully when i get my Gryphon on Friday it will all go in smoothly. i will have to wait for my custom tunes but that's

I love the intake, it does make some noise when you step on it but it's not bad. Bill installed my intake and the programer as we test drove it he commented to me that this intake was not as loud as S&B and Volant. Like Bill said maybe because the tube is not long the sound waves dont generate as much and having a bigger filter is another advantge. Many people have commented that type of filter suck in a lot of hot air, well I have been monitoring the IAT temp. and is about 2 deg. hotter than ambient air at most. Another cool feauture is that it can be used with a workable ram air hood scoop to keep the temperature equal to ambient air, however the only draw back to that ofcourse is incliment weather but with a temporary cover that can be resolved. I defenately felt an increase in power after those two mods. but since the jlt and the gryphon were installed the same time I don't know how much performance was given by the intake thru the seat of the pants dyno. My recommendation is to use the programer with this cai and if you plan to install an exhaust after the tunes than you should have it retune because your A/F ratio will be more lean if a less restrictive muffler is used. I hope this info is useful and good luck.

Sounds good man. I dont think my truck needs to be any louder. I already have a flowmaster with duel pipes and 4 inch outlets on it that make it pretty loud. My GF says i cant sneak up on anyone in that truck now you can hear me coming all the way down my street.

I did send info to Bill and Corey that i have the JLT and Flowmaster cat back exhaust so im hopping that's in the custom tune i want.