Fuel issue
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3rd Gear
Joined: Jun 2023
Posts: 7
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From: Baltimore
Fuel issue
Need help!! I have a 2008 Sportster 1200. Fuel injected. At low speeds, 40 mph or less, it feels like I'm running out of gas. I use high octane gas, I've replaced the air filter, sparkplugs, fuel injectors, fuel sending unit, (fuel pump, filter, pressure regulator) Nothing seems to work. Any suggestions?
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Have you tried cleaning your IAC , should be done at every service interval . Remove your air cleaner , place a rag inside the TB , with the ignition on , if you toggle your off / run switch ( do not start ) you'll notice the pintle retract . Get some throttle body cleaner ( not carb cleaner ) and spray up into the hole , the rag will catch all the crud . After you clean out the iac , clean the butterfly and throttle body seat .
Grand HDF Member
Joined: May 2014
Posts: 3,826
Likes: 1,170
From: florida
EFI 101, when trying to diagnose an engine performance issue on a fuel injected motorcycle, that runs, test and confirm that fuel pressure is in specification.
you do it early in the process so that it doesnt come back to bite you in the *** later. low fuel pressure or intermittantly high and low pressure can present in lots of different ways, from no start to all kinds of performance issues.
m
you do it early in the process so that it doesnt come back to bite you in the *** later. low fuel pressure or intermittantly high and low pressure can present in lots of different ways, from no start to all kinds of performance issues.
m
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,064
Likes: 1,003
there could be many issues or combination there of.
if your system uses o2 feedback, then an o2 sensor could cause the issue also.
best bet is data logging.
checking fuel pressure is always a good idea.
machine throwing any codes?
i ride gravity, it never fails
if your system uses o2 feedback, then an o2 sensor could cause the issue also.
best bet is data logging.
checking fuel pressure is always a good idea.
machine throwing any codes?
i ride gravity, it never fails
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