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So it sounds like it runs fine, then begins missing when driving. Does it begin missing immediately when under load? Just wondering if the spark plug wires might be old and arcing under the insulation. That or something else with the ignition, such as Greg's thought about the coil which would especially show itself when warmed up.
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On December 17, 2019 at 7:17 PM Greg Lemon <grglmn@gmail.com> wrote:
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I know you said float bowls full, but first thing I think is sediment in the fuel line or bottom of the tank, flow pushes it into restriction point, car misses and stops, pressure is released, flows again, rinse, lather, repeat.
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But if you are sure it is not that, maybe capcitator (once, I had one go out, and it gave a weak intermittent spark that got worse when things heated up) or coil.
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Greg Lemon
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TR250
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On Tue, Dec 17, 2019, 5:25 PM William Pugh <
<a href="mailto:anabil007@comcast.net">anabil007@comcast.net</a>> wrote:
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<br> I know…not a Triumph…but he is a good guy and the 948cc engines are all alike…maybe.
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<br> Anyway it starts instantly, sounds good, off for a drive…begins missing, badly.
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<br> Stop … wait 10minutes … starts right up. ??? fuel pump works, carb bowls full … tis a puzzle .
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<br> I think there must be a kink somewhere in the fuel system, near exhaust, expands/closes…put, put. Running rich plugs black. We have tried almost everything with no success , any ideas greatly appreciated .
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<br> Thanks for listening
<br> Bill Pugh
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