Steve Saunders Goldwing Forums - View Single Post - 86 SEI Running rough suddenly

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post #14 of (permalink) Old 04-28-2019, 06:50 PM
glhonda
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Join Date: Jun 2010
Location: Olympia, Washington, USA
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Black smoke, white smoke, blue smoke. Once you get the manual, locate the pressure regulator. Check the vacuum line to it. Inspect the line for fuel. The pressure regulator may be ruptured allowing fuel into the intake un-metered. Check the fuel pressure if you have the tools available. Generally speaking, removing the vacuum hose from the regulator will increase fuel pressure @10psi. Pull the hose and plug it with your finger. Note the change in rpm. Increase means your running lean. Decrease would indicate mixture was already close to correct. Leaving the vacuum line disconnected during this test will speed up the engine. More fuel. More air.

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