Why is my Evo missing at high revs?
When you go to give it some throttle though, it starts spitting back through the carb and missing. Especially under a heavy load, like riding up a hill. If you power through this missing, it starts going well at higher revs, but still misses a bit.
How many cams are in a Harley Davidson Evo?
Harley’s decision to stick with the semi-unit construction of previous Sportsters resulted in a distinctly configured valve train. Unlike most of today’s motorcycle engines, the Sportster Evo uses just one cam per each overhead valve, resulting in four independent gear driven camshafts.
Where does the throttle position sensor wear out?
Throttle Position Sensors (TPS) typically wear in the idle and just above idle positions, but they may also have dead spots at any point in their range of travel. With the key on, engine off, graph the sensors output while slowly opening the throttle all the way.
When did the Harley Davidson Evolution engine come out?
The Evolution (Evo) engine is a V-twin engine that has been manufactured by Harley-Davidson since 1984 for a variety of different motorcycle models. The engine design is often credited with saving Harley-Davidson from bankruptcy after the management buyout and subsequent reorganization that the company went through during the early 1980s.
What happens when the throttle body goes bad?
Nowadays there is an electric system that’s far more efficient than the old ways but it can still have issues. When a TPS goes bad, then the car’s throttle body won’t function properly. It could either stay shut or it won’t close properly which is a severe issue. If it stays shut then your engine is not going receive air and it won’t start.
When you go to give it some throttle though, it starts spitting back through the carb and missing. Especially under a heavy load, like riding up a hill. If you power through this missing, it starts going well at higher revs, but still misses a bit.
Harley’s decision to stick with the semi-unit construction of previous Sportsters resulted in a distinctly configured valve train. Unlike most of today’s motorcycle engines, the Sportster Evo uses just one cam per each overhead valve, resulting in four independent gear driven camshafts.
The Evolution (Evo) engine is a V-twin engine that has been manufactured by Harley-Davidson since 1984 for a variety of different motorcycle models. The engine design is often credited with saving Harley-Davidson from bankruptcy after the management buyout and subsequent reorganization that the company went through during the early 1980s.