Hi all,
I have a carburetor question for you;
What could be the cause of fuel dumping through my manifolds on a 78 gl1000?
I've been having a lot of trouble trying to figure out what is happening to my 3rd cylinder - when I pull the plug for that cylinder while running it doesn't affect the rpms.
I suspect fuel is dumping through the manifold too quickly because cylinder 3's manifold was Ice cold to the touch while running; I actually found fuel sitting in the combustion chamber when I removed the manifolds to get at the carburetors. Not a little bit of fuel - It was completely full. This problem also happens intermittently on cylinder 4 when the bike is leaning to that side and running.
I thought that the vacuum piston was hanging up on the cap (It has a mean ding in it - and upon inspection the piston is definitely rubbing on the inside of the ding), so I replaced the the suspect one with a very clean one from a 79 carburetor I have. It hasn't corrected the problem!
I'm intending to rebuild the 79 carburetors to use with this bike, but would like to have it running in the mean time.
Compression is good on all cylinders: 160-175. Cylinder 3 is the 160. Spark is great.
Do you guys think I should just focus my efforts and energy on rebuilding the 79 carburetors, instead of getting hung up on the problem in the 78s? I'm learning a ton through trouble-shooting; by every measure I'm a complete novice though. Is it a stuck float? Can I test for that? Please HELP!
I have a carburetor question for you;
What could be the cause of fuel dumping through my manifolds on a 78 gl1000?
I've been having a lot of trouble trying to figure out what is happening to my 3rd cylinder - when I pull the plug for that cylinder while running it doesn't affect the rpms.
I suspect fuel is dumping through the manifold too quickly because cylinder 3's manifold was Ice cold to the touch while running; I actually found fuel sitting in the combustion chamber when I removed the manifolds to get at the carburetors. Not a little bit of fuel - It was completely full. This problem also happens intermittently on cylinder 4 when the bike is leaning to that side and running.
I thought that the vacuum piston was hanging up on the cap (It has a mean ding in it - and upon inspection the piston is definitely rubbing on the inside of the ding), so I replaced the the suspect one with a very clean one from a 79 carburetor I have. It hasn't corrected the problem!
I'm intending to rebuild the 79 carburetors to use with this bike, but would like to have it running in the mean time.
Compression is good on all cylinders: 160-175. Cylinder 3 is the 160. Spark is great.
Do you guys think I should just focus my efforts and energy on rebuilding the 79 carburetors, instead of getting hung up on the problem in the 78s? I'm learning a ton through trouble-shooting; by every measure I'm a complete novice though. Is it a stuck float? Can I test for that? Please HELP!