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Old 11-11-2003, 02:01 PM   #1
Dg0
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Problems: rough idle and cutting out

Recently aquired a 68 cougar with a 351 windsor. Ran great for a couple weeks. Now after starting, it idles fine for a couple seconds(30 maybe) then the engine starts shaking as the rpm's go from 1000 down to 0 and jump back up. during this time I can keep it running if i get it up over 2000 rpms? The weird thing is that this just happened one day, took it out the day before with no problems. I checked all the spark plug wires and they haven't been knocked loose or anything, it almost seems like it's missing a cyl or two when it's happening. Anything else to check other then pulling the plugs and replacing the wires, which i need to do anyways?

Thanks

Derek
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Old 11-20-2003, 01:57 PM   #2
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Ok, i've replaced: plugs, plug wires, distributor cap and rotor. Just rebuild the carb, hoping that this works because the first 4 things accomplished nothing. If anyone has any idea's on this i'd be happy to try almost anything now.

thanks,
Derek
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Old 11-20-2003, 03:06 PM   #3
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maybe check vacuum lines...
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Old 11-20-2003, 03:23 PM   #4
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Yeah, check for vacuum leaks first.

Some other sources for this kind of problem - sticking mechanical advance and EGR.

You say the carb was rebuilt? Is the choke opening up? Was the float setup correctly? Maybe try tapping it from the side of the float bowl.
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Old 11-21-2003, 08:20 AM   #5
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Ok, it looks like it is the choke... it's got a manual choke, i'm not exactly sure how this thing is supposed to work, it doesn't appear to be hooked up to anything? But if I operate it manually while someone is in the car, it runs like a charm... I am thinking i'll just get the electric choke conversion, any one have experience with that? Appreciate the help

Thanks,
Derek
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Old 11-21-2003, 02:32 PM   #6
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Personally I like manual chokes. Then again it doesn't get too cold here compared to some places.

I hooked up a cable and ran a long heavy spring from the linkage towards the front of the engine. This allows me to pull the choke closed to start the car (hardly ever need to choke it) and once started I just let the cable go. The spring pulls the choke all the way open.
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