I am having an issue that just started out of nowhere on my bike 2007 electra glide classic. It wants to cough back through the intake, so it and sputter and cut off occasionally. I have. K&N open air filter, freedom performance headpipse, and DNT megaphone mufflers. I've checked everything I could think of other than the injectors. I was wandering if anyway has had a similar issue where putting a tune on the bike fixed the problem? I was going to tune it soon but was going to install some cams in it first then tune but didn't want to spend the money on cams and tune if I have an underlying issue.

 

99 % of the time it is a lean AFR .

 

Check for vacuum leaks, plugged fuel filter, injectors. Engine is not getting enough fuel or it's getting too much air.

 

Sounds like an open filter and a free flowing exhaust without a tune.
Really cannot do stage one af and pipes w/o a tune(r).
OP could always put the stock filter or exhaust back on and see if that makes it better.

 

If you had all those mods before it started acting up and it was running good, i would look for an intake leak. I agree 99% of the time coughing back thru the intake is a lean AFR.

 

Check for intake leak. Using can of ether with straw hose/line. Start bike, using ether, spray towards intake (where it connects at the heads) NOT at the carb opening. If it runs rough that brief period, you have found your leak.

 

iac or tps.

 

 

I had a similar problem a few years ago. It would run okay for a couple of hours and then start 'sneezing' out the air cleaner.
It turned out to be a pin hole in the fuel line inside the tank. As the fuel level went down the 'sneezing' would get worse until
I couldn't get the bike above about 50 mph. (Fuel pressure on EFI bikes needs to be around 50 psi.)

 

Clean the IAC port. I do my 07 twice a year. Does exactly what you are describing.