Date: Tue, 11 Sep 2007 17:11:57 -0700
Reply-To: Michael Elliott <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Michael Elliott <camping.elliott@GMAIL.COM>
Subject: Re: My poor MPG, O2 sensor seems okay
In-Reply-To: <24102114.1189555223616.JavaMail.root@elwamui-sweet.atl.sa.earthlink.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Interesting hypothesis. If the fuel pressure was low, would mpg be low yet
engine power pretty darn normal?
--
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
On 9/11/2007 5:00 PM Joseph Fortino wrote:
> 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
>
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