Elliot wrote:Does that Carter have an anti-dieseling solenoid? If that solenoid has weakened (by an internal short in the windings, presumably), it could explain the erratic idle. I replaced a lot of those solenoids in my day.
Elliot wrote:Poor fuel mileage could be as simple as a sunken float. They do not last forever, regardless of material.
Elliot wrote:No. But verify first that it has one. If it does, you can test it by pushing it in and then putting your finger on the vacuum nipple -- it should hold itself in.
So see if you have one. It would be by the regular idle screw, and it pulls the throttle a little bit open when activated. It is perfectly possible you don't have one.
ygmir wrote:IIRC, you can get a 2bb/4bbl adapter plate, to put the 2bbl on that 4bbl manifold.
you'll have the same "low end" the 4bbl only comes into play for top end H.p.
make sure the air cleaner still has clearance under the closed hood.......ask me how I know that..........
EspressoDude wrote:check to see if a prior owner has cobbled up the linkage for the secondary barrels, so that they are forced to open when the pedal is mashed. Have seen a lot that have a screw wedged into them that messes all throttle control. Also look to see if the primary throttle plate is tight in the shaft and the shaft is not wobbling in the carburetor body. this could prevent proper closing.
Canoe wrote:I'm coming in late on that Carter 4bbl, but have you replaced all of the vacuum hoses recently? If you've got any of that emissions crap and a vacuum leak, then all bets are off for Carters. If you replace the hoses and haven't done so before, make sure you don't rip them all out at once, but replace them one at a time to make sure you don't inadvertently change anything. If the vac hoses haven't been replaced for a while, they should be anyway. They can look great but be leaking too.
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