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My DF15 has started exhibiting a new (and unfortunate) behavior.... Instead of running along with both cylinders firing, it will drop back to a single cylinder... Additional info:
* More pronounced when cold, especially at first startup, but does not disappear entirely when warm.
* When the engine drops back to a single cylinder, it won't be a single miss, it will start missing on that 2nd cylinder for 2-30 seconds consistently, then return to normal operation
* The cylinder that's missing is the LOWER of the two in the engine. I know this because I pulled the sparkplug wires off when it was exhibiting the behavior... Pull the top wire and the engine died immediately. Pull the lower wire and the engine carried on.
* Plugs look clean/okay (though I've not changed them), I've put a spark detector inline on the lower wire and it shows good, I also got a nice little jolt when I pulled off that lower wire with the engine running (d'oh!)
I have the service manual, and am ready to dive in and tackle this -- but am looking for some more expert opinions on where I might go first?
* More pronounced when cold, especially at first startup, but does not disappear entirely when warm.
* When the engine drops back to a single cylinder, it won't be a single miss, it will start missing on that 2nd cylinder for 2-30 seconds consistently, then return to normal operation
* The cylinder that's missing is the LOWER of the two in the engine. I know this because I pulled the sparkplug wires off when it was exhibiting the behavior... Pull the top wire and the engine died immediately. Pull the lower wire and the engine carried on.
* Plugs look clean/okay (though I've not changed them), I've put a spark detector inline on the lower wire and it shows good, I also got a nice little jolt when I pulled off that lower wire with the engine running (d'oh!)
I have the service manual, and am ready to dive in and tackle this -- but am looking for some more expert opinions on where I might go first?
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