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Steve
Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6832
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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04 road king backfiring throught intake replaced intake seals

Customer Question

04 road king backfiring throught intake replaced intake seals still doing it compresstion test fine 170 both cylinders help
Submitted: 1 year ago.
Category: Motorcycle
Expert:  Steve replied 1 year ago.
the "cough" from the intake is a LEAN MIS-FIRE.you should check the replaced intake seals by spraying CARB CLEANER on the seals with the engine at idle.you will know right away if the seals are good or not.- if you have no intake leaks.....the cause of the lean mis-fire is a lean air/fuel mixture.- if that is the case, you will have to rich up the air/fuel mixture to solve the problem.- if the bike is fuel injected, you will have to rich up the fuel map.- if the bike is carbureted, you will have to correct the problem with the carb.......if the engine used to run good, then the issue may be the carburetor needs cleaning. the problem may also be incorrect jetting if the motorcycle was moved from a higher altitude to a lower altitude. let me know if you need more helpSteve
Customer: replied 1 year ago.
How do you go about inriching the map\fuel sencer on fuel injection?
Expert:  Steve replied 1 year ago.
it depends on when this all started.if it was all good and then this started, something may have caused it that is not related to the fuel map. tell me everything that happened.Steve