Engine Problem

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RattyBarracuda

RattyBarracuda

Destroyer of Legend at C/S Speed LLC
FABO Gold Member
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Location
Scott Township (Lackawanna County), PA
My friend recently has his 340 rebuilt and has been running it for over a month now with no problems at all. Yesterday he noticed that if got on it ans gave it any amount of throttle whatsoever it would serge and cut out, then come back to life. Today he started it, it missed like crazy and when he gassed it even a little bit it stalled. It has fuel. The primary ignition circuit is fine, 1.6 ohms at the ballast resistor, and good spark comes out of the coil tower. sometimes the spark plug wires have spark most of the time they dont. One thing i noticed, he's using a dual point mallory distributor on set of points sparks the other doesnt...could this be the problem?
anyone have an issue like this or any ideas. I'm down to bad points or out of adjustment, cracked cap, poor contact between cap and rotor, or a bad condensor...
 
stroker416 said:
My friend recently has his 340 rebuilt and has been running it for over a month now with no problems at all. Yesterday he noticed that if got on it ans gave it any amount of throttle whatsoever it would serge and cut out, then come back to life. Today he started it, it missed like crazy and when he gassed it even a little bit it stalled. It has fuel. The primary ignition circuit is fine, 1.6 ohms at the ballast resistor, and good spark comes out of the coil tower. sometimes the spark plug wires have spark most of the time they dont. One thing i noticed, he's using a dual point mallory distributor on set of points sparks the other doesnt...could this be the problem?
anyone have an issue like this or any ideas. I'm down to bad points or out of adjustment, cracked cap, poor contact between cap and rotor, or a bad condensor...
Click to expand...

i would check the remaining things you mentioned. also check the timing, make sure the dizzy hasn't turned :wack:
 
You do have to maintain a points ignition, and with a hotter than factory coil, they may get out fairly quick. Do either of you own a dwell meter? That's the only way to really get things "dead on". Gapping gets you close, dwell gets you exactly where you want it. Also, if one set of points on a dual point gives up, you can disconnect it, and run on a single set to get home. In fact, when you set dual points, you set one at a time anyway. Also, dont forget, Dwell effects timing, timing doesnt affect dwell, so when you do get it set right, you'll need to verify the timing is what you wanted.
 
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