Date: Tue, 11 Sep 2007 17:00:23 -0700
Reply-To: Joseph Fortino <fortino1@EARTHLINK.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Joseph Fortino <fortino1@EARTHLINK.NET>
Subject: Re: My poor MPG, O2 sensor seems okay
Content-Type: text/plain; charset=UTF-8
dude from the stats on your van,, 15mpg thats kinda low
fuel pressure reg?? putting out correct PSI?
THESE vans keep us thinking all the time..
Joe
-----Original Message-----
>From: "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM>
>Sent: Sep 11, 2007 4:42 PM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: My poor MPG, O2 sensor seems okay
>
>On 9/11/2007 2:48 PM Jack R. wrote:
>
>> Changes in your AFM?
>
>My O2 sensor works and indicates that the mixture is not too rich or too
>lean. I've had the van for a few years and the mileage hasn't changed
>for better or worse. It just stays worse.
>
>> Vacuum leak?
>
>Would this result in a too rich or too lean mixture?
>
>> Air filter?
>
>Clean.
>
>> Weight change?
>
>You saying this van makes my ass look big?
>
>I've always gotten this mileage but I always carry about the same amount
>of gear, so no data there.
>
>> Bad sensor or wire, thus sending weak signal to your computer?
>
>The fact that the ECU is keeping the mixture neither too rich nor too
>lean suggests that the loop is closed and the ECU is able to "see" the
>sensor.
>
>> Wheel alignment?
>
>I've had the wheels aligned at least once since I got the van, and did a
>tire change, the wheels are wearing normally, and the mileage has not
>gone through any changes.
>
>> Tire Pressure change?
>
>Keep 'em aired per sticker.
>
>> Tire balance?
>
>Two sets of tires, no vibration, no change in the mileage since I've
>gotten the van.
>
>> Bad shock?
>
>This can affect mileage? How would I know?
>
>> AC Compressor, Alternator, PS Pump... going bad, adding resistance?
>
>Hm. Engine has surprisingly not overheated even after climbing Sherman
>Grade up Highway 395 to Lee Vining in 109F heat so if there is something
>dragging on the engine I've got good a cooling system. But you're right,
>any extra drag can haul down mileage. However, if something is going
>bad, it's doing so very very slowly because I've had the van for a few
>years and the mileage hasn't changed. No A/C.
>
>> Fouled plug(s), or bad wires or bad distributor cap?
>
>Plugs are clean, wires seem to be peachy, dizzy cap is clean.
>
>> Bad Fuel injector(s), causing imbalance at load. (run up to three
>> consecutive takes of Techron or other Fuel Injector Cleaner)
>
>Hm. Hadn't thought of that, either. I'll run some cleaner.
>
>These are great suggestions. Only thing you didn't think of was bad ju-ju.
>
>--
>
>Mike "Rocket J Squirrel" Elliott
>71 Type 2: the Wonderbus
>84 Westfalia: Mellow Yellow ("The Electrical Banana")
>74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
>KG6RCR
|