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Old 03-23-2004, 11:04 PM
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chevy 350 missing

I have been trying to diagnose this problem for about a week. It runs as though a spark plug wire has come off. Ovbiously I checked all of those. It started off with a miss like only running on 7.5 cylinders, now is more like 7 cylinders in the past few days. One more piece of needed detail, I had not done anything to the car before this happened. Car ran good for the longest time, and all of the sudden started missing and gradually gets worse. Here's the hardware: mallory dual point distributor (converted to unilite electronic ignition), MSD blaster 2 coil, MSD wires, AC Delco plugs. So far I have tested all of these in one form or another. Ignition module tests good according to the test mallory says to do. Coil is good, since the ohms test and just for the heck of it, swapping one out. The wires and plugs are brand new. However, when I was changing the spark plugs part of the ceramic piece around the electrode inside the engine had broken off. I thought this was the problem, that turns out not to be the complete problem. The only thing that doesn't seem to test to par is the ballast resistor. I am supposed to have MSD's .8 ohm ballast resistor, which I have. It tests out at 1.6 ohm's. Although it tests negative I am skeptical that this is the problem, but ordered a new one any how and will be getting that tomorrow. My next guess is that this would be a problem with the cam or compression. Any info would be great.

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Old 03-24-2004, 05:34 AM
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18436572......

Check to make sure the wires are on right.....or a bad wire.
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Old 03-24-2004, 05:44 AM
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Then take a compression check.
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Old 03-24-2004, 01:40 PM
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maybe a bad spark plug wire??? can you determine which cylinder is misfiring? try to find it and test the resistance in it.
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Old 03-24-2004, 08:02 PM
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Have you checked all your vacume lines?

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Old 04-01-2004, 02:33 PM
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Hey, I got the thing running good again. Some how the one of the valves on #2 were staying open a little. So I adjusted the valves again and fixed part of the problem, the other part of the problem was a broken spark plug that was loose in #8. Just so happened to be the last one that I checked, go figure. Anyway, thanx for your input.

Brad
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