HELP! EFI Throttle partially stuck open
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Stage III
Joined: May 2023
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From: CT
HELP! EFI Throttle partially stuck open
2011 Street Glide, I was in a parade Monday and the bike was pretty hot. I throttle up to rev (for the crowd) and it stayed at 3000RPMs. The engine light came on and I had the P1511 code. The throttle itself feels fine, snaps back, etc., but even after letting it cool down and inspecting what I could see of the throttle body and connections, it's still going to 3k on start-up and staying there unless it's under load. It is beyond my limited knowledge, I'm tempted to buy a new TPS but I don't want to just throw parts at it... any other ideas for what I should look at?
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,138
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From: SE Michigan
2011 Street Glide, I was in a parade Monday and the bike was pretty hot. I throttle up to rev (for the crowd) and it stayed at 3000RPMs. The engine light came on and I had the P1511 code. The throttle itself feels fine, snaps back, etc., but even after letting it cool down and inspecting what I could see of the throttle body and connections, it's still going to 3k on start-up and staying there unless it's under load. It is beyond my limited knowledge, I'm tempted to buy a new TPS but I don't want to just throw parts at it... any other ideas for what I should look at?
Edit - I dont see that code in the TSB I was thinking of, so probably not the issue.
Last edited by Keithhu; May 31, 2023 at 08:37 AM.
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Stage III
Joined: May 2023
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From: CT
If I'm not mistaken, that code is generally associated with fretting where the sensor connects to the ECM, solution is generally to pull it apart, clean the prongs, apply a small amount of dielectric grease, reconnect, clear codes.
Edit - I dont see that code in the TSB I was thinking of, so probably not the issue.
Edit - I dont see that code in the TSB I was thinking of, so probably not the issue.
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,138
Likes: 6,163
From: SE Michigan
This is essentially what's buried in that article:
Built into the system is a reset function. If the ignition is turned off with the throttle in a position other than 0 percent throttle, the system wants to use a higher rpm as the new idle speed the next time the engine is started. If you shut the bike off at 1,800 rpm, the next time you start the engine it will use approximately 1,400 as the new idle speed. To keep this from occurring you can reset the idle by turning on the ignition switch until the fuel pump cycles on and off, then turning off the ignition. Repeat this three times and the idle speed will be reset to normal, 1,000 rpm.
Last edited by Keithhu; May 31, 2023 at 09:04 AM.
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Stage III
Joined: May 2023
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From: CT
just to follow up on this--I learned some lessons here. After a week or so of online research, and questioning friends that know stuff, my suspicions were correct, it was very likely the throttle position sensor. I had seen throttle bodies (where this thing lives) for $5-800 and was in a panic over it because I was in between jobs but also saw hundreds of TPS switches out there for $20-50 but I could not find the correct one or part number to find it anywhere. Out of total frustration, I went down to the only HD dealer open on a Sunday in the area and explained the situation as best as my non-mechanical brain could.
Parts Guy: you can't find it because Harley doesn't sell it...
Me: ummmmmm....
Parts Guy: you have to buy the whole throttle body...
Me: ....
Part Guy: it'll run you about...$230 but I think they're on backorder... supply chain....oh wait, we have one in stock.
Me: SOLD! How hard is the install?
a few hours and youtube videos later, I pulled the air filter, intake, seat, tank, etc., my friend helped me with the actual install, and reassembly and I was back on the road! The throttle response seems slightly better but that might be in my head.
so, probably a sensor worth $5, cost me $240ish (couple gaskets, etc.,) a 12 pack of Blue Moon for a friend, a few hours, and some laughs.
Parts Guy: you can't find it because Harley doesn't sell it...
Me: ummmmmm....
Parts Guy: you have to buy the whole throttle body...
Me: ....
Part Guy: it'll run you about...$230 but I think they're on backorder... supply chain....oh wait, we have one in stock.
Me: SOLD! How hard is the install?
a few hours and youtube videos later, I pulled the air filter, intake, seat, tank, etc., my friend helped me with the actual install, and reassembly and I was back on the road! The throttle response seems slightly better but that might be in my head.
so, probably a sensor worth $5, cost me $240ish (couple gaskets, etc.,) a 12 pack of Blue Moon for a friend, a few hours, and some laughs.
Seasoned HDF Member
Joined: May 2012
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From: Carlsbad, CA
Have you tried something like this>? https://ridermagazine.com/2009/02/12...01%2C000%20rpm.
This is essentially what's buried in that article:
This is essentially what's buried in that article:
But, make sure the throttle grip is fully closed when doing this.
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