2007 Ultra Classic. 96" Stage 1. Rinehart true duals. Andrews 48 cams.
Fuel mileage about 30mpg. check eng light started coming on. found code P1353. Front cyclinder combustion? No oil usage.Any ideas. 49,000 miles

 

Check your plugs and plug wires. Had same code on my sons heritage a year or so ago. Plug wire wasn't pushed down onto the plug.

 

as above check the plug wire boot is on the plug- seen a few riders dislodge this on wash day


if your mpg number is typical that shows a real tuning problem unless you are running + 80 MPH all day long.

in terms of plugs and wires, stock spec wires and plugs give best results ( see "ion sense")

a misfire can be spark or spark timing- too little fuel, too much fuel or valve timing due to cams or pushrod length- or efi problem fuel pressure or volume ( filter?), ecm programming via a tuner, ion sense or o2 sensor acting up


did it run better before you did any work? - can this change be tracked down to any recent changes with the bike?

mike

 

It pulls better with the new cams. I've had it tuned by 2 different people. But it was after the cams that the fuel mileage went to crap. I'm usually a pretty conservative rider

 

with that it could well be the plug is fouled, pull it and see if it is wet- does your oil smell like gas? if so change it right away

mike