Engine hesitating - MVAgusta.net
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post #1 of 21 (permalink) Old 04-14-2014, 05:33 AM Thread Starter
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Engine hesitating

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Last couple of rides I've experienced significant engine roughness/hesitation at low revs <4.5K, comes in when bike is at full operational temp. Runs fine above this rev range.Bike is 3K past 24K service so thinking things like plugs etc should be fine.Any hints to what it might be?

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post #2 of 21 (permalink) Old 04-14-2014, 11:43 AM
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I'm having a very similar issue with my 2012 F4R.

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post #3 of 21 (permalink) Old 04-14-2014, 04:24 PM
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I would suggest a couple of options Steve.
For a cheap one try running a can of fuel injection cleaner through the system. I have used LiquiMoly from Supercheap as it is labelled as safe for cats. Give it a good thrashing at high revs and full throttle in an appropriate area.
Seeing as you are due for service, I would suggest getting booked in with Ozracing as he uses Axone for diagnostic software, which is very comprehensive. He can see pretty quickly if anything is out of wack. It could be as simple as plugs starting to break down under load.
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post #4 of 21 (permalink) Old 04-14-2014, 11:54 PM
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Steve,dig out the service invoice,did they charge you for spark plugs?


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post #5 of 21 (permalink) Old 04-15-2014, 03:59 AM
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Oops, I read that as overdue for 24k service.
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post #6 of 21 (permalink) Old 04-18-2014, 09:00 AM
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Sounds like mapping to me. If your still running the stock Ecu you may need an update. If no update is needed I was suggest a fuel management system like Bazzaz (what I have on my 2012 f4r) PC v or microtec. Have a tuner build you a custom map and you will see a world of difference throughout the rpm range smooth as silk. Especially if the turner is good and knows what he is doing.


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post #7 of 21 (permalink) Old 04-19-2014, 07:23 PM Thread Starter
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Quote:
Originally Posted by revhead1957 View Post
I would suggest a couple of options Steve.
For a cheap one try running a can of fuel injection cleaner through the system. I have used LiquiMoly from Supercheap as it is labelled as safe for cats. Give it a good thrashing at high revs and full throttle in an appropriate area.
Seeing as you are due for service, I would suggest getting booked in with Ozracing as he uses Axone for diagnostic software, which is very comprehensive. He can see pretty quickly if anything is out of wack. It could be as simple as plugs starting to break down under load.

Hi Jon - going into the shop for a checkout next week - if no satisfaction will try ozracing.


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post #8 of 21 (permalink) Old 04-19-2014, 07:24 PM Thread Starter
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Quote:
Originally Posted by mitchy View Post
Steve,dig out the service invoice,did they charge you for spark plugs?

Yes - checked out ok.


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post #9 of 21 (permalink) Old 04-23-2014, 09:54 PM Thread Starter
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Well I'm stumped - threatened the bike by taking a trip into the workshop today and it's decided to lose all engine hesitation issues previously described :-/
Shall take it for a jolly good flogging this afternoon to double check - hopefully it isn't one of those randomly occurring issues.


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post #10 of 21 (permalink) Old 04-24-2014, 02:40 AM Thread Starter
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Ok - so took it for a ride up some twisties - low and higher revs - performed flawlessly.
Until... After riding another 30 odd km - stopped at lights for a couple of minutes and it started to idle a bit rough. Didn't seem to run on all four when pulling away and ran rough until I got home a couple of km later.
Really puzzling
NB had stopped at a couple of intersections during early part of ride but no rough idling issues then. Had fuelled 1/3 way thru trip but can't see this having affected anything given problem didn't show for at lead another 60km.

Wtf?


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