Having RPM fluctuations at about 2400 down to 2000 and back to 2400 RPMS, and around 5500 down to 5000 and back to 5500 RPMS. Fluctuations do not occur at idle 1800 RPM or WOT, just at certian RPM points. Fluctuations stop if more throttle is applied. BUDS didn't detect any error codes, nor were the injectors or coils or fuel filter were bad.
What could be causing these RPM fluctuations. Bad ECM? Does the original ECM need to be cleared or upgraded to match the new rebuilt SBT engine? Can these fluctuations cause engine damage?
1 reply to this topic
#1
BoomerFL
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- Members
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Novice
- Year of DOO:2008
- Model of DOO:Challenger 180 SE
- Engine in DOO:Rotax 4-TEC SCIC
Posted 28 February 2009 - 01:43 AM
#2
Kevin Leclair
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- SDSB Management
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SeaDooSportBoats.com Founder
- Water:Allatoona Lake
- Year of DOO:2010
- Model of DOO:210 Wake
- Engine in DOO:Twin Rotax 4-TEC SCIC
Posted 02 April 2009 - 07:17 PM
Have you had your dealer diagnose these RPM fluctuations, they typically can review this with the B.U.D.S. system? 
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