Some stats' on VX mileage

[VehiGAZ]

That was the sub-text, yes. ;-)

I don't think any of us bought our VXs without knowing the fuel economy situation. But significant decreases in economy (other than by our own zany mods) is a perfectly legitimate gripe.

[Chopper]

Sorry, I'm the exception. I've always gotten 17 or 18 here in very flat Fla.. Mobil 1 and Green Grease all around with fanatical matainance. True- when I blast around, it'll drop to 11.

[deermagnet]

The lowest mpg I've gotten is 17.5. I always run stock size tires, so my odometer is apparently correct. Last summer I checked my mileage with three fills in a row on stock spark plugs with 77K miles and got 19.73-19.97. This week with new plugs after 9K miles I filled up and drove 304.6 miles. It took 15.44 gallons to refill, so that comes to 19.73 mpg. I guess it could be the summer fuel mix, but whatever it is, I like it.

Mark Griffin

[Jolly Roger VX'er]

When I went to the Vermont VX-Plore meet from PA I was running my VX with cruise at 65 most of the way traveling interstate 90 with 31" Bridgestone Revo AT's(@40psi with 44psi max) and the SC/CF intake and got 22.6 mpg (no adj. for tire size) on the way to the meet and busted 23 mpg (no adj. for tire size) on the way back. I did swap out my fuel pressure regulator a few weeks back.

Spazz...I think you should change out your fuel pressure regulator...my VX got worse mileage over time and even started having starting issues when hot (i.e. stopping for gas it would take 2-3 times to restart)...all of this was cured when I changed out my fuel pressure regulator.

[SPAZZ]

Fuel Pressure Regulator???

[Jolly Roger VX'er]

Fuel Pressure Regulator???

oops..sorry...yes thats what I meant..."fuel pressure regulator".

http://www.vehicross.info/gallery/sh...time=&sortdir=

[SPAZZ]

how easy to change myself??

[Jolly Roger VX'er]

how easy to change myself??

I pretty sure I paid about $48 and ordered from my dealer. You can also buy what my dealer called a rebuild kit for $12 but I recommend buying the whole unit as you see it in the pic posted in my last post.

I have the SC so I only had to remove the one fuel rail with 3 injectors..you being stock I can't remember if you have to remove the whole fuel rail or not...somebody please chime in! You should begin by pulling off the cosmetic cover that has the 3.5 DOHC on it and you'll see your fuel rail with fuel pressure regulator attached to the rear of the driver side where fuel line hooks to bottom of it. Ask Tone if nobody chimes in but my job only took about an hour to do...not hard. I had to replace two injector o-rings too because they were damaged either when installed or when I pulled them out.
The new part has a new lock ring too in case you don't want to reuse the old one. If you can do all that CV front-end stuff you do spazz, this is a piece of cake......I purged fuel pressure too just like when you change fuel filter so you don't have gas spraying all over!

[SPAZZ]

$48???? huh, what??? Isuzu dealers I talk to want like $200 ..even St Charles and the auto parts stores want like $150 to $170 for the "Fuel Pressure Regulator.

Where do you shop?

[Jolly Roger VX'er]

$48???? huh, what??? Isuzu dealers I talk to want like $200 ..even St Charles and the auto parts stores want like $150 to $170 for the "Fuel Pressure Regulator.

Where do you shop?

I bought mine at the new ISUZU dealer here in Erie, PA and I know I paid with tax like $52:

AUTO EXPRESS---ISUZU
10320 WATTSBURG RD
ERIE, PA 16509
(814) 825-4747

Also found the fuel pressure regulator at this website for $52:

http://www.drivewerks.com/cgi-bin/pp...sure+Regulator