OK. Call me a dirty traitor, but I'm having issues with a Rochester Quadrajet carb and this is the best forum for honest expert advice I've ever come across. I used to have an account here, but it's been a few years since I've been at Stangnet. (I still have my pony, though!) If it makes you boys feel any better, the carb's on a chevy 350 block in my boat.
Ok. Now that I've got that out of the way, here's my story:
I have a Rochester Quadrajet that recently started to leak fuel all over the engine. The engine has previously run fine with a few hundred hours on it. Upon inspection, this fuel leakage/overflow is emanating from the point where the accelerator pump piston passes through the top of the carb body. (Please see the blue arrow, and oh yeah, this pic is of a Quadrajet, but I took it from off the net, and it's not a pic of the actual carb in question). This happens 5-10 seconds from startup.
What I've done/tried since the problem began:
1. replaced the accelerator pump (including the rubber "cup") assembly with a new one from a rebuild kit. This did not help.
2. Adjusted the float level in an attempt to limit the amount of fuel entering the fuel bowl. Checked for a "sticking" float. The float appears to be intact and operating correctly.
3. checked needle valve for goop/sludge/etc. that would keep it from closing properly when the fuel float floats "high" because there is already adequate fuel in the bowl for that exact moment.
The engine did sit over winter, but has been started occasionally and run, and this appears to be a new problem, rather than one which has gone on for a while and is just now being noticed.
I'm at my wit's end. I'm scared to death to have free-flowing fuel pooling up on my engine and on top of the intake manifold, spilling down to who knows where.
What am I missing?
Thanks in advance!
Ok. Now that I've got that out of the way, here's my story:
I have a Rochester Quadrajet that recently started to leak fuel all over the engine. The engine has previously run fine with a few hundred hours on it. Upon inspection, this fuel leakage/overflow is emanating from the point where the accelerator pump piston passes through the top of the carb body. (Please see the blue arrow, and oh yeah, this pic is of a Quadrajet, but I took it from off the net, and it's not a pic of the actual carb in question). This happens 5-10 seconds from startup.
What I've done/tried since the problem began:
1. replaced the accelerator pump (including the rubber "cup") assembly with a new one from a rebuild kit. This did not help.
2. Adjusted the float level in an attempt to limit the amount of fuel entering the fuel bowl. Checked for a "sticking" float. The float appears to be intact and operating correctly.
3. checked needle valve for goop/sludge/etc. that would keep it from closing properly when the fuel float floats "high" because there is already adequate fuel in the bowl for that exact moment.
The engine did sit over winter, but has been started occasionally and run, and this appears to be a new problem, rather than one which has gone on for a while and is just now being noticed.
I'm at my wit's end. I'm scared to death to have free-flowing fuel pooling up on my engine and on top of the intake manifold, spilling down to who knows where.
What am I missing?
Thanks in advance!