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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Hi DDM1 Do I detect a glimmer of hope? I agree, something is wrong and needs fixing. I've had a guy 'tweak the idle' by 'the wire' but apparently no change in the engine was detected. The boat always did idle at 700rpm - so something has changed?? As a mechanic said to me, she is now not going...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Many thanks all dodge Will keep you posted when I get back to the boat and I've more to report - hopefully after this weekend
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Hi All dodge yes the ECM Ref voltage needs investigated. I've still got the Rinker diagnostic tool - if that can assist in some way? Eitherway, the 'Low idle set point' is held at 600 rpm and the rev counter confirms that the engine is indeed idling at 600rpm. I feel this is too rough running...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Would that suggest a possible faulty Throttle position sensor?
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    The only fault code that appeared was P0180. Which is supposed to be Fuel temp sender I personally dont understand 'low idle set point 600rpm' - cause that's the actual problem, this engine is supposed to idle at 750rpm?
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Ok. So I have managed to get hold of a diagnostics machine. We've got the following results:- Fuel Temp 163 f. Intake Air Temp 59 f. Coolant Temp 123 f. Low idle Set Point 600rpm ***** ? RPM at injector 715rpm (reflected by throttle position note below) Fuel Shutoff Solenoid 100% ECM Ref Volt...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Ahh I see. Ok will perhaps try this again on Monday. Thanks Alldodge
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    I had a guy who services the engine undo the feed lines into the injectors. I wasn't present. He seemed to think that they were ok - but then he added that it would be difficult to assess what he was looking for as he had nothing to benchmark against.
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Well, I've changed the filters and no improvement. Adjusting the throttle cable to 'hold' the engine throttle arm above idle position, achieves 750rpm, but it proves inconsistent and won't accurately hold position when constantly playing the throttle at the helm. I'm getting the lend of a...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Thanks All Dodge Soon as I can get replacement filters I will test. Hoping this weekend, failing that the following one. All sounds a bit cheaper so far than tackling an ECM problem. Fingers crossed.
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Yep good one
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    This is good. I am beginning to see the logic here. For reference, No codes are evident, no MIL light illuminated. Honestly not sure about smoke - would need to test again as this happened over eight weeks ago - and I'm still trying to acquire a mechanic who is prepared to travel to the...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    Hi thanks for that. She 'will' happily hold 750 rpm if I manually advance the throttle lever above the normal position at the engine. Would that still happen if there is a fuel/air constriction? If it wasn't a 'tronic' engine I would simply adjust an throttle idle adjuster screw - if you see...
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    Idle speed, Mercruiser 2.8 165hp D-tronic

    I've got a bit of an issue.....anyone any suggestions? After a lovely afternoons cruising at circa 1200 rpm I throttled back to idle when coming alongside. The engine revs immediately fell back from the recommended 750rpm down to 3-400 rpm which sounded, lets say, a tad rough. The engine will...
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