Question about 2005 Harley Davidson FXD - FXDI Dyna Super Glide

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Motor bogs out when i pull throttle

The motor bogs out when im passing someone on the freeway seems like to much gas. i changed fuel filter and O2 sensor i have a 2005 dyna glide

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First when you say it bogs, does the motor stutter or does it just go flat? A very good test to determine if the problem is to much fuel or a lean situation is while riding get in top gear with a load on the motor at full throttle. Slowly roll out of the throttle about 1/8th throttle and see if the motor picks up RPM's. I'm suspicious that you may possibly have a plugged air filter or perhaps something blocking the air inlet. Does the bike get worse fuel mileage? Have you checked the valve clearance lately? Tight valves are notorious for the problem you are having. Please contact me with test results and I can further diagnose your problem. I'm confident we can resolve your problem as soon as we determine which direction we need to go.

Posted on Nov 30, 2008

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I have a 1997 ford f350 with a 7.5 gas engine. 128,000 miles. When I step on the gas with or without a towing load the motor bogs down for about 10 seconds then pics up speed and clears out. Almost like...


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Reduced power on hills or inclines


It could be either, but I'd lean toward the fuel filter for three reasons - first off, that symptom is usually indicative of a clogged fuel filter (you drive fine when the road is level and your engine doesn't need too much power, but when you go uphill, or punch it to pass, it bogs because the filter is clogged and restricts the flow of fuel to the engine). Also, I'd do the filter because it's both easier and cheaper, and even if it doesn't fix the problem fully, the fuel filter is a wear item that needs replacement periodically and you're therefore not wasting money by buying one and installing it. Finally, a bad O2 sensor will usually throw a fault code and a check engine light. It has to be fully "bad" to do so, and could be getting there but not bad enough yet to throw a code, but the fuel filter is a more likely candidate. Change that out and see if the problem goes away.

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