Date: Thu, 13 Sep 2007 01:25:59 -0400
Reply-To: Jason Brand <kitambi@EPICSOL.ORG>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jason Brand <kitambi@EPICSOL.ORG>
Subject: Re: My poor MPG, O2 sensor seems okay
In-Reply-To: <000701c7f4e4$773ff6f0$0201a8c0@MASTERPC>
Content-Type: text/plain; charset=us-ascii
I didn't think these vans ever came with lockup torque converters?
On Tue, Sep 11, 2007 at 10:27:28PM -0400, Dennis Haynes wrote:
> I've been vaguely following this trend and the one thing nobody mentioned
> was the possibility of a bad torque converter. Yes, they do go bad. They
> can fail where they do not multiply torque causing poor acceleration and
> then not properly lock up always having some slip. Also, the 1.9L and auto
> combination often have poor fuel economy. The 2.1L got a revised converter
> with different stall speed and lock up characteristics. Works a bit
> better. Still, 16-18 mpg seems about normal.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Michael Elliott
> Sent: Tuesday, September 11, 2007 8:12 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: My poor MPG, O2 sensor seems okay
>
> 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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