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Re: 1986 Chev vapor canister...necessary?Posted by Jon Hagen on April 21, 2003 at 20:44:20 from (63.160.195.57): In Reply to: 1986 Chev vapor canister...necessary? posted by Dennis Minn on April 21, 2003 at 17:54:09:
On an 86 the canister collects gasoline vapors from the fuel tank vent and carb bowl vent. There should be another hose from a carb vacuum port to the canister to purge it of fumes when the engine is running. I suppect the tank vent hose is plugged off causing the pressure/vacuum in the fuel tanks. If you can get a look under the hood of a pickup of the same year,you should find a decal depicting the routing of all hoses.
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