Well I just got done installing the VP12 VOLO Performance Chip a few days ago and it seems to have resolved my idling issue. It is true that the VOLO changes your fuel mapping and therefore the idle is set a bit higher. This resulted in a better gas pedal reaction. The Pathy now has a much better and smoother response on takeoff. I have to remind you that I do have a K&N FPIK cold air intake system. My previous Idle problem could have been a result of that but the chip accounts for having it installed so that makes a big difference.
A few days ago I showed a Mustang GT driver (4.6l generation) the rear end of my truck . Blew him away until we hit 100MPH and then he passed me but it felt goooood. I was able to rev out the engine at 6250RPM's between the first two shifts. Man it feels better than my old F150 5.4L Lariat when it pulls away. (The Lariat was also modified with K&N, Gibson Exhaust & Dialo Performance Chip).
As far as the fuel economy is concerned I also have seen an increase, I take a trip to see my buddy once a month and it is about a 225 mile round trip. The last few times I went to see him I was getting 19.8MPG with 93 Octane fuel. This last trip with the VOLO I got 21.9MPG
doing the same thing I always do and also using 93 Octane fuel. In my City driving I noticed an increase but do not have the proof yet. It definitely looks like I am going to get at least 1MPG more. I will update you when I have some firm numbers.
I know that there are a few blogs out there about the VOLO and I researched what I could find on it. A lot of folks do not believe the claim is true but I am here to tell you it worked for me. I will have it paid for in 7 to 8 months through the savings of fuel alone. So I would say it is definitely worth it. The FS3 VOLO is supposed to get even better results which I will buy and try on our Matrix. I will keep this thread updated on my results.