Harley Davidson Twin Cam 88 emitting gas vapors?

Question

I own an HD FXSTB with a TC 88. I recently added the Screamin Eagle Heavy Breather to compliment the Performance of my Vance and Hines Short Shot Pipes. I had the breather professionally installed and the Download done by the dealership (Fuel Injected). However, my fellow bikers complain that when behind me they get a vapor smell coming from the pipes. Is this normal when running performance pipes and breather or did the dealership mess up the download. Any advice is appreciated.

Answer 1

Sounds like you better have them try it again

Did your V&H system come with Mapping specs?

In short its burning rich -If you can read your plugs they are prob black

Answer 2

I've dealt with some of these down loads, like a Power Commander, for example, ( there are many others). They piggy back your ECU, and some people just have it tell your ECU that the bike is running colder than it is, and therefore it adds more fuel, not enough to flood it but enough to make it run to rich. After the bike has been running for awhile, put it on the kick stand and rev it up a little, see if it's blowing black smoke out the exhaust. It should not . Hope this helps

Answer 3

The V&H Shortshots (1986-06 Softail) don't have a boss to install the o2 sensor for the fuel injection, so the bike is always running in open loop mode instead of closed loop mode.  A closed loop system running at cruise speed with no o2 sensor will create a rich condition.  The download that the dealership did was probably correct for a bike that has had breather and exhaust modifications, the system just can't work correctly because it doesn't have all the pieces of the puzzle.

The Shortshots Staggered for EFI models have the o2 sensor boss.  Does your exhaust have the o2 sensor installed and working correctly?  Are you getting any DTC codes, such as the Security light coming on for 8 seconds when you turn on the ignition switch?  If there isn't wiring coming from your exhaust pipe, then you've got the wrong pipes.