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05-27-2010, 11:09 AM
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#1 |
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Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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uses too much gas
My father-in-law has a 1985 Chevy with the 305 and 350 trans. The carb is a four barrel. My question is: When the truck is just sitting with the engine at an idle you can watch the gas gage needel slowly move towards empty. The truck is out of gear and just sitting there. What could cause this? I am at a lost. I want to help him but have no clue as to why he is useing so much gas. Anyone?
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it)  CHEVY, American made w/pride!  If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER!  GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
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05-27-2010, 10:15 PM
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#2 |
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Registered User
Join Date: Dec 2006
Location: SLC, UT
Posts: 706
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Re: uses too much gas
First off you need to actually determine if it is "using" gas or if there may be a problem with the gauge or the sending unit, or both.
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05-27-2010, 10:20 PM
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#3 |
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Registered User
Join Date: Nov 2009
Location: Sonora California
Posts: 860
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Re: uses too much gas
Is it a dual tank truck? If so it maybe returning fuel to the other tank. I think 86 had a return line from the fuel pump or filter. A friend said his over filled and cam out the cap of the other tank.
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05-28-2010, 07:14 AM
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#4 |
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Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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Re: uses too much gas
Yes, it is a dual tank and he does use both tanks. The left tank is showing full and the right tank is the one now being used. When the right tank gets low he fills it back up and goes to the left tank. Back and fourth between the two tanks. I found out it is not a 85 but is a 1986 truck.
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS Last edited by 86swb; 05-28-2010 at 07:15 AM. |
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05-29-2010, 04:19 PM
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#5 |
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Registered User
Join Date: Jan 2010
Location: Louisiana
Posts: 127
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Re: uses too much gas
Check for leaks?
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