Anyone around Lancaster Pa that knows how to use a Power Vision to tune my bike. The tune up they sent me worked for about a year or so then a ping when accelerating. Called fuel M.O. they told me how and how to get the video's> Anyway its all Greek to me. I can take it to a dyno tuner I have used in the past but would like to save money.

 

EFI Tunes don't go bad over time..... If it ran really well for a year, and now has a developed a problem, it's most likely something else that has changed... worn parts (ie: plugs), low quality gas, etc.... many possibilities...

My advice... if it ran well initially after downloading the tune, is to figure what has changed to cause the pinging...

If it had an intermittent ping since downloading the tune, or you have a ping under conditions that you have never operated under since tuning the bike (ie: 105° weather, loaded heavy in extreme hills, etc) then the tune needs to be adjusted...

If by "fuel M. O." you mean FuelMoto... then you can send them a datalog, they will adjust the tune, send it back to you, and you just download the adjusted tune... It really is pretty easy to do... after my first auto tune session and datalog run, I actually found it kind of fun... their videos really make it simple...

In any case, I would make sure all maintenance is current and all everything else is in good working order, before changing a tune that has run well for a year... You'd hate to retune or adjust a tune, just to compensate for a maintenance/ worn part issue...

Good luck..

 

Got to agree with Hat on this one.

I got a Power Vision from Fuel Moto when I did the Stage 1 upgrade on my new to me ‘18 Ultra. The tune from FM seems to be pretty spot on.... thanks guys.

I need to invest more time into learning the nuances of the Power Vision, but I don’t think adjusting the fuel map is your answer. Good luck

 

So been doing this bike thing for 50 or more years now. I just don't get this computer ****. Before I made the post I did check the plugs they looked good but I changed them anyway. I just don't trust myself working with computer **** so I will just take to a tuner I have used in the past then I know its right. Maybe I should ride my 65 pan that I know how to make run right.

 

Agree with others, a tune just doesn’t go bad…but situation and riding conditions can change.

Did you get the PV from Fuel Moto? They will send you a tune if you fill out the form properly.
Otherwise, there are a TON of videos out there to do an auto tune session. It really isn’t that hard.
if you can log onto a PC and post on a forum, you can use the Auto Tune feature, it may be all that is needed…and would be the first, free and easy thing to try.

 

If one one of your pre **** bikes started ping/pinking/detonating what would you look for?

I would check for air leaks as it could be an indication of a lean mixture (assuming none of what hattitude posted is true).

It could be fuel delivery; filter, pump or injectors.

Is there any codes stored? Harley Trouble Codes (fuelmotousa.com)

 

Roger that....

I only started trying to learn about the EFI on these bikes, because my EFI bikes run so well, in so many different conditions, and EFI isn't going away.... The more I looked into it, the more curious I became, and the more fun it started to be...

I also have an '01 carbed softail that I dialed in, with no computers anywhere around, and it runs awesome...!!

I would LOVE to add a '65 panhead to my garage!!

Good luck with the fix... and please report back when you get it sorted....

 

Two quite different things that have caused pinging/detonation from my experiences.

First. I had a problem with detonation/pinging from my 07 Electraglide. I couldn't get the autotunes down to the 5% or under threshold. This was the only other sympton. No codes or other running issues I could determine. Finnally I took my bike after a couple of years, out to Fuel Moto for a 107 Big Bore build. First thing they did was put the bike on their dyno to get a benchmark before check. They called me that afternoon and told me my fuel pump was failing at 3KRPM and up. The Dyno Map immediately showed flat lining at 3KRPM. They said it was a common problem with HDs.

Second issue. I started having pinging and it was a intermittent, and getting codes saying I had a sensor failing. Turned out I had never changed my spark plug wire that was failing. New High-Performance (SE) wires solved the problem. I had 8 years on those wires. stock plug wires don't last that long.

Consider those two possibilities. I forget what year bike you said you have, but it could also be a failing sensor.

 

As I read your post, it confirms what I was saying... that tunes don't go bad..

I was trying, maybe ineptly, to make the point that if it was running well on a new EFI tune, and then starts to run poorly later, it is most likely another, mechanical reason for the change in running condition..

Your suggestion of treating it like a carb bike, is wise. When a carb bikes starts to ping/detonate, you don't automatically re-jet the carb... Looking for possible air leaks leaning out the mixture, fuel delivery, filter, pump or injectors are all examples of mechanical issues causing the problem rather than the tune "going bad"...

IMHO... Good post, excellent advice...

 

One other thing it could be is an engine that has run overly rich and the carbon build up is now causing detonation as the mixture is being compressed. That is usually in high mileage engines but still something to consider.