You said you pluged all the vacuum ports but i'm wondering if you plugged the vent port at the top of the carb that goes to the chacole canister, if so this could be the cause of your trouble!
Sounds to me like the vacuum advance diaphram is busted. When you hook it up, you have a vacuum leak. When it's not hooked up, it runs fine til it hits that wall where the timing needs to be advanced more, but isn't since you disconnected the advance. Remove the distributor cap and rotor, connect the hose to the advance nipple on the distributor. Suck on the hose and watch the breaker plate and see if it moves when you suck on the hose. If it doesn't and you feel no resistence to the vacuum, the diaphram is busted. If there is resistence and no movement, the breaker plate is frozen. The vacuum pod can be bought by itself, I changed mine a couple years ago, bought a new one at Advance Auto Parts. If the breaker plate is frozen, time for an new or fresh reman distributor.
So far he has said he has a new MDS distributor on it and a MSD 5520 ignition box and a MDS blaster 2 ignition coil. Remanufactured motorcraft 2V new fuel pump, plugs, and 8mm wires. He has all the vacuum ports plugged off on his carburetor and he has not gapped his plugs so lets look at what his problems might be. Like Mavman 72 has said it might be a bad gap on his plugs so we will take that into account and not discredit him, so that might be the problem. Of course it might be that because he plugged all of his vacuum ports off and has this big vacuum advance on the distributor that is supposed to move when his engine hits a certain RPM, but currently its doing nothing but sitting there looking pretty... So all in all it might just be that the pretty looking vacuum advance on the distributor is the problem.... If it was connected properly and working we might not be having this discussion
That is the port I'm plugging it into. I believe I have the 2100. I will have to test it with my vacuum gauge to see if it has vacuum when first turning it on. I will let you know what happens
My car doesn't have a charcoal canister and the top port on the carb is plugged. There's a port on the top front and top rear. Which one are you referring too?
If he's got an MSD system, the plug gap needs to be wider than .035. Needs to be at least .045 to .055.
Which one would you recommend for my setup? .045 or .050 or .055 I've never gapped sparks plugs before. As stupid as it sounds I thought you installed them and they would gap theirselfs.
gap em to .045. That's the setting for plugs run with a Duraspark system. MSD is pretty much the same system, only costs a whole lot more. The parts houses have bins full of gap gauges usually at the front counter.
I also forgot to mention that the steel line that runs from the gas tank to the firewall doesn't have a hose on it and I'm not sure where it goes or if it could causing air to be sucked into the fuel pump at higher speeds.
It's not a problem. The one on my Comet's been open for the last 4 years. It's just venting the tank if anything.
