Hey guys, I apologize in advance for the long post, but I'm having some issues getting my newly purchased '61 F250 to run correctly. I read a couple of other post on this forum relating to my issue and tried what was suggested before I signed up as a member, but I'm hoping someone here can help me.
I cannot get the truck to idle at all without the choke partially on. In fact it does not seem to want to run at anything under about 1500rpm without the choke on. If I completely open the choke and hold the idle up (around 1200-1500) it has a noticeable stumble and struggles to run.
With the choke very slightly on I can get it to idle down to around 800rpm but runs pretty rough at that point. Any lower rpm than that it will sputter and die. It does not seem to be running off of the idle mixture screw whatsoever as turning it does not make any difference to rpm, vacuum or idle quality.
Carb was rebuilt by previous owner, I removed it, cleaned it out and blew compressed air as well as carb cleaner though all the passages. New cap, rotor, plugs and wires. I have set the points gap as well as the dwell per tune up spec. Found that the intake gasket was leaking so I replaced it. I even set the valves thinking that they were maybe too tight, when I checked them they were at .010 or less.
I have tried adjusting the timing and setting idle per a previous post, trying to obtain highest vacuum at idle, still won't idle. I'm currently at about 10degrees timing. The truck runs great down the road and seems to have the right amount of power.
Like I said earlier it does not seem to be using the idle circut, as I can see it pulling fuel through the main jet constantly at idle.
What am I missing?
I was unable to find what the throttle linkage/carb setup was supposed to look line online, here is mine. Is this normal or am I missing and important piece? This spacer was installed between the carb and intake when I got the truck and I have tried tuning it both with it and without. I'm also wondering how the idle is adjusted as I do not see any idle adjustment screw besides the one on the choke cam, which to me would be the high idle screw.
Any help would be greatly appreciated
I cannot get the truck to idle at all without the choke partially on. In fact it does not seem to want to run at anything under about 1500rpm without the choke on. If I completely open the choke and hold the idle up (around 1200-1500) it has a noticeable stumble and struggles to run.
With the choke very slightly on I can get it to idle down to around 800rpm but runs pretty rough at that point. Any lower rpm than that it will sputter and die. It does not seem to be running off of the idle mixture screw whatsoever as turning it does not make any difference to rpm, vacuum or idle quality.
Carb was rebuilt by previous owner, I removed it, cleaned it out and blew compressed air as well as carb cleaner though all the passages. New cap, rotor, plugs and wires. I have set the points gap as well as the dwell per tune up spec. Found that the intake gasket was leaking so I replaced it. I even set the valves thinking that they were maybe too tight, when I checked them they were at .010 or less.
I have tried adjusting the timing and setting idle per a previous post, trying to obtain highest vacuum at idle, still won't idle. I'm currently at about 10degrees timing. The truck runs great down the road and seems to have the right amount of power.
Like I said earlier it does not seem to be using the idle circut, as I can see it pulling fuel through the main jet constantly at idle.
What am I missing?
I was unable to find what the throttle linkage/carb setup was supposed to look line online, here is mine. Is this normal or am I missing and important piece? This spacer was installed between the carb and intake when I got the truck and I have tried tuning it both with it and without. I'm also wondering how the idle is adjusted as I do not see any idle adjustment screw besides the one on the choke cam, which to me would be the high idle screw.
Any help would be greatly appreciated