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I have a 2008 Suzuki DF50 outboard that's run like a charm until my last trip out. When I open the throttle quickly the engine stumbles and runs roughly. That continues until I back off on the throttle and wait until the motor suddenly runs smoothly. If I ease the thottle open slowly, all is well. Either way the motor develops full rpms when it's finally running right. Idle is a bit rough.
I replaced the low pressure fuel filter three months ago. I replaced the external filter/separator last week. Fuel system is bled well, no bubbles in the low pressure filter, bulb pumps up fine. No water in fuel.
I had a check engine light with 3-1 flash code and one beep. That seems to indicate the IAC valve is cycling too much. I understand that the cause could be a bad IAC or dirty IAC and air lines. I've checked the resistance of the IAC and read 13.7 ohms. Two online references say it should be 21.5 – 32.3 ohms.
Does the 13.7 ohms indicate a bad IAC? Or should I look for another problem?
Thanks very much for any help.
Don Abrams
Ocean Springs, Mississippi
I replaced the low pressure fuel filter three months ago. I replaced the external filter/separator last week. Fuel system is bled well, no bubbles in the low pressure filter, bulb pumps up fine. No water in fuel.
I had a check engine light with 3-1 flash code and one beep. That seems to indicate the IAC valve is cycling too much. I understand that the cause could be a bad IAC or dirty IAC and air lines. I've checked the resistance of the IAC and read 13.7 ohms. Two online references say it should be 21.5 – 32.3 ohms.
Does the 13.7 ohms indicate a bad IAC? Or should I look for another problem?
Thanks very much for any help.
Don Abrams
Ocean Springs, Mississippi
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