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JD 630
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Miss/Cross firing

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Joe S.

04-03-2003 11:18:47




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Starts up and runs OK cold. Once warmed up and placed under a load - starts miss fire or both fire at once - resulting with no power. The load screw is wide open. Cap looks good on the inside - no gray marks.




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Joe S

04-04-2003 06:56:35




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 Re: JD 630 - Miss/Cross firing in reply to Joe S., 04-03-2003 11:18:47  
Thanks for the help. Sending the brother to the shed to work on the suggestion.



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DON

04-03-2003 14:30:43




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 Re: JD 630 - Miss/Cross firing in reply to Joe S., 04-03-2003 11:18:47  
CLOONEY IS RIGHT ON BUT IF THIS TRACTOR HAS BEEN IDLING AND RUN ON LIGHT LOADS ALL WINTER I'D PUT IN A NEW SET OF SPARK PLUGS. WE HAD THIS PROBLEM WITH CUSTOMERS EVERY SPRING. DON



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Clooney

04-03-2003 12:14:05




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 Re: JD 630 - Miss/Cross firing in reply to Joe S., 04-03-2003 11:18:47  
Joe, a little more information on when the problem started & how long it's been acting up will help us get you closer to the problem.
~Try a couple of things to see if you can point us down the correct path. ~See if running with the choke partially back on helps the problem, if so you are probably fighting a carb problem, or lack of fuel flow to the carb.
~Then feel the ignition coil when it's acting up & see if it's too hot to touch, if so you probably have an incorrectly wired or missing ballast resistor. If the coil is hot & you have a volt meter see if the coil power side terminal is running over 8 volts [engine running], if so you have resistor problems.
~If the plug wires are still in the conduit tubes pull them out as they might be cross firing in the tubes.
~Make sure your spark plug wires aren't automotive TVRS resistor wires but are solid metal core wires..
~Another thing to look for is that the exhaust manifold heat valve is set at EXACTLY hot or cold & not in between.
~Post back with a little more info & we can get you real close to your problem..

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