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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine only runs with vacuum line disconnected
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<blockquote data-quote="Zpetrus" data-source="post: 1447507" data-attributes="member: 98038"><p>Thank you again for the input. Interestingly, as both Torch and Roadrunner suggested, I tried disconnecting the wires to the Pressure sensor located the fuel rail and no improvement - still no start - however with it connected it ran when I introduced the vacuum leak at the fuel pressure regulator (disconnected that line) and the bike would start and rev with pressure sensor disconnected it would not run. I am thinking it is this sensor as it is out of spec and the diagnostic on the bike keeps pointing to it. Also a new observation - when I disconnect the fuel line gas flows freely which I think I read somewhere that only that which was in the line would leak. Is this true or is it possible when I replaced the fuel pump an o-ring did not seat or something?</p><p>Again I did clean and check all the vacuum lines for leaks. I did check all the wiring harness for breaks and the connectors for corrosion when I kicked the mice out.</p></blockquote><p></p>
[QUOTE="Zpetrus, post: 1447507, member: 98038"] Thank you again for the input. Interestingly, as both Torch and Roadrunner suggested, I tried disconnecting the wires to the Pressure sensor located the fuel rail and no improvement - still no start - however with it connected it ran when I introduced the vacuum leak at the fuel pressure regulator (disconnected that line) and the bike would start and rev with pressure sensor disconnected it would not run. I am thinking it is this sensor as it is out of spec and the diagnostic on the bike keeps pointing to it. Also a new observation - when I disconnect the fuel line gas flows freely which I think I read somewhere that only that which was in the line would leak. Is this true or is it possible when I replaced the fuel pump an o-ring did not seat or something? Again I did clean and check all the vacuum lines for leaks. I did check all the wiring harness for breaks and the connectors for corrosion when I kicked the mice out. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine only runs with vacuum line disconnected
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