54 Hornet high rpm miss
Comments
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My first guess would be ignition , and just because its new dont discount a possible bad condenser or coil.
Roger0 -
I agree with Roger. The new condensers are Chinese made and my success rate is about 1 out of 3 last any time at all. If you have a cheap condenser and/or points, I would throw them out and get a good set from Echlin.0
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My question then becomes, would a condenser be fine only to a certian rpm and then go intermittent at higher rpm and load ?0
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Make sure you have Champion spark plugs H-10's, set at .032" and your valves set cold at intake .014" and exhaust set at cold .017". Timing set at TDC, long mark on flywheel. Walt.0
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If the miss goes away momentarily when you lift the accelerator but comes back after a second or two ...look for a fuel delivery problem. Fireing a lean mixture is not easy and your Hudson will miss. But as mentioned above.. A weak ignition will cause a similar problem.0
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A miss under load is more often than not a spark problem ... usually the plugs or wires. If your plug wires are several years old, change 'em out. Ever have trouble starting it on a damp or rainy day? That's another indicator of bad plug wires.0
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Were the symtoms the same before the new parts were installled? What new parts were installed in the ignition system? Lee O'Dell0
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the problem was worse before the ignition parts were installed.0
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Harry, here's a way you can check the condenser pretty reliably: remove dist. cap and rotor so you can see the points. Bump the starter to a point where the points are open. Pull the hi-tension wire out of the center of the distributor cap, leaving the other end connected to the coil. With ignition on, hold the end of the H-T wire about 1/4" from the block or other good ground, and using a screwdriver, ground the movable point arm to the breaker plate, then "unground" it. You should get a good sharp "snap" and a blue spark from the H-T wire to the block or whatever. If the condenser is bad, the spark will usually be weak, yelow and anemic looking. it0
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Anyone have any thoughts on this ? My 54 Hornet, runs great up until about 60 mph. At 60+ mph it starts to miss.... it's seems to be when it's under load going up a grade. Any ideas? The ignition system is new from last season.
The majority of your replies note the problem might be ignition related. You stated the problem got worse when new ignition parts were installed. Recently I was faced with the exact problem and after several frustrating days of trouble shooting determined that the point gap was incorrect. This problem was self induced due to using a feeler gauge marked 0.020 which indeed was too thin! Using my electronic calipers, I selected a gauge with the appropriate thickness and the point gap was reset. Problem solved. Hope your problem is easy as mine to solve.
Ken
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I had a 51 Hudson doing that to me a few years ago. The problem was not obvious till I pulled the distributor out where I could see good. The stainless steel leaf spring on the points had slipped out of the nut. Leaving only the brass leaf to operate points. They worked ok till the motor got to 1800 rpm or so then they would float and all would go to crap.
Roger0
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