what does the vac gauge read at idle, in park?
Greg in Fla
-----Original Message-----
From: Don Slaney <ppm@dlcwest.com>
To: old-chevy-truck@yahoogroups.com <old-chevy-truck@yahoogroups.com>;
OLETRUCKS <oletrucks@autox.team.net>; 6066_GMC_Truck@egroups.com
<6066_GMC_Truck@egroups.com>
Date: Sunday, March 18, 2001 1:37 AM
Subject: [oletrucks] OVERDRIVE/MILEAGE/ECONOMY?
>Off Topic! But?
>I'm at a loss to a problem I have, not serious, but even General Motors
>Canada does not have an answer. But I bet someone on here has one?
>
>I have a vehicle to haul ole trucks home, [ONLY GENERAL MOTORS PRODUCTS]
>a 1986 American Chevrolet Caprice wagon.
>
>It has a Fuel economy {vacuum guage} in dash.
>
>When driving on a straight flat highway, in overdrive, it reads just above
>1/3 toward the best fuel economy.
>
>When I pull shift lever to ordinary drive, the economy increases by 50% the
>needle closes in on maximum economy. Which suggests I am getting better
>mileage in ordinary drive than overdrive.
>
>This happens when tow-baring an ole girl home to the collection or plain
>highway driving. It has almost 400,000 KMS or 248,560 miles. Motor never
>touched, except plugs and a fuel pump. Uses no oil and power to burn.
>
>Any all suggestions, ideas greatly appreciated.
>
>Regards to all, Don. ppm@dlcwest.com
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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