strean
Member
Hi! all
My 98 GSX Limited feels like it's running on only one cylinder from idle up to around 3700 RPM, at which point the "mis-fire" becomes less regular; at 4K and up runs smooth and fast.
Initially, I've cleaned the carbs and fuel filters, replaced the needle valves (came from the prev owner with 2.3's which I replaced with the same), replaced the fuel lines and fuel selector. Compression was a bit low on one cylinder at the time (iirc about 127 & 115) so I did the top end and replaced the reeds. Still have the "mis-fire" ...
Just did pop-off pressure test (though not sure if this would contribute to my problem?) and I'm at 22 & 21 psi. One thing I noticed is that though both valves hold pressure, after they pop, one side loses almost 100% (maybe 5 psi left) of its pressure whereas the other loses only about 5-10 psi. (115 gram springs on both sides, arms don't look noticeably bent) If one needle valve wasn't re-sealing quickly could that cause one of the cylinders to run rich, causing the "mis-fire"?
Thanks for any help!
--
Mike
My 98 GSX Limited feels like it's running on only one cylinder from idle up to around 3700 RPM, at which point the "mis-fire" becomes less regular; at 4K and up runs smooth and fast.
Initially, I've cleaned the carbs and fuel filters, replaced the needle valves (came from the prev owner with 2.3's which I replaced with the same), replaced the fuel lines and fuel selector. Compression was a bit low on one cylinder at the time (iirc about 127 & 115) so I did the top end and replaced the reeds. Still have the "mis-fire" ...
Just did pop-off pressure test (though not sure if this would contribute to my problem?) and I'm at 22 & 21 psi. One thing I noticed is that though both valves hold pressure, after they pop, one side loses almost 100% (maybe 5 psi left) of its pressure whereas the other loses only about 5-10 psi. (115 gram springs on both sides, arms don't look noticeably bent) If one needle valve wasn't re-sealing quickly could that cause one of the cylinders to run rich, causing the "mis-fire"?
Thanks for any help!
--
Mike