34 pic 4 dash pot
Posted: 22 Jun 2019, 22:30
Sooo
Replaced my carb with a machine 7 rebuilt one from Germany, it’s a 34 pic 4 on my CT t25 1.6, had it set up by my normal guy but from the moment of picking the bus up somthing wasn’t right.
The revs can take forever to die away or even stay on making breaking a tricky business. Now I at first it seemed like the accelerator pump arm was the issue as it was missing busings that my old one had causing it to stick. But now after fixing that I’m thinking that maybe it’s the dash pot unit these carbs have powered from the air cleaner box vacuum.
So the question here is what can I do to fix/prove this so I can sort it or get the carb swapped out for a working one?. I tried checking the little one way valve that’s inline before it and that seems ok. I’m guessing I could just simply block it off and drive without it and if the problem stopped that would be a clear sign wouldn’t it?, unless anyone else has a good idea?.
Also can you still buy them or can I services it at all, looks like I can’t open it. Do they serve any “real” function, I know they help emissions and help stop stalling (is that at cold though as never had any issues with a quick throttle off causing stalls on my old 34 pic 3’s before?) but how noticeable or worth while is it?.
Thanks guys
Replaced my carb with a machine 7 rebuilt one from Germany, it’s a 34 pic 4 on my CT t25 1.6, had it set up by my normal guy but from the moment of picking the bus up somthing wasn’t right.
The revs can take forever to die away or even stay on making breaking a tricky business. Now I at first it seemed like the accelerator pump arm was the issue as it was missing busings that my old one had causing it to stick. But now after fixing that I’m thinking that maybe it’s the dash pot unit these carbs have powered from the air cleaner box vacuum.
So the question here is what can I do to fix/prove this so I can sort it or get the carb swapped out for a working one?. I tried checking the little one way valve that’s inline before it and that seems ok. I’m guessing I could just simply block it off and drive without it and if the problem stopped that would be a clear sign wouldn’t it?, unless anyone else has a good idea?.
Also can you still buy them or can I services it at all, looks like I can’t open it. Do they serve any “real” function, I know they help emissions and help stop stalling (is that at cold though as never had any issues with a quick throttle off causing stalls on my old 34 pic 3’s before?) but how noticeable or worth while is it?.
Thanks guys