Low RPM fueling issue - MVAgusta.net
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post #1 of 24 (permalink) Old 04-21-2016, 10:31 PM Thread Starter
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Low RPM fueling issue

First of all I went to the "all you need to know" section and it seems I may have to replace fuel lines or something like that. Will remove the canister too if I see one in there.

The last few times I have ridden I have noticed that at low rpm below 2000, the engine runs roughly and is hiccupping. Tonight I rode to work and as the issue was happening I noticed a soft flickering of the low fuel lamp. Something I did not notice during the day. I believe there may be air getting into the fuel lines at low RPM. When I got to work I opened the gas tank and tried to see if I saw bubbles rising as it idled. The vibrations from the engine made the surface of the gas ripple so I could not discern if there were bubbles.

So after reading all the info I will have to do the job myself. Hopefully I will be able to obtain all the necessary tools and parts and tackle this soon.

If anyone has had a similar problem let me know Thanks

James M.
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post #2 of 24 (permalink) Old 04-22-2016, 01:09 PM
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James;

You'll need some Clic-R pliers EBay ~$13-14 watch the shipping

While you're in there change the fuel filter too I use WIX #33012


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post #3 of 24 (permalink) Old 04-23-2016, 12:16 AM Thread Starter
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Thanks Noel, will buy those right away- along with the other items that I saw in the post. Spectacular !! Avatar.. Oh the Joy!

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post #4 of 24 (permalink) Old 05-10-2016, 02:51 PM Thread Starter
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Ok, started this post and wanted to update and ask for help.

The issue is that as the bike is not idling smoothly at temperature. I replaced the fuel filter and bought a new battery. I found the fuel level sensor loose and I pushed it back into the tube where it belongs. The fuel lines seemed ok. There was some debris in the tank, I believe from the first fuel line replacement.
So I put it all back together and it seemed ok, however after riding for a while as the tempreature is at about 205, The rough idling begins. It is not like its missing a cylinder but as a split second stall.

Strange how it happens when its hot and not cold.
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post #5 of 24 (permalink) Old 05-10-2016, 04:35 PM
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Change your spark plugs, and while you have the tank off go around all the electrical connections with dielectric grease.
If that doesn't fix things, I would then get the injectors cleaned.
All simple cheap stuff, before you go looking further.
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post #6 of 24 (permalink) Old 05-10-2016, 08:54 PM
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I had the same problem with my 1078 and like Jon says replace your spark plugs with iridium.NGK CR9EIX.Also check for any vacuum leaks.


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post #7 of 24 (permalink) Old 05-11-2016, 06:19 AM Thread Starter
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Installed new iridium plugs about 2 months ago, check. Same ones you mention Mitch. Will go back as soon as possible and re-check the connections. The di-electric grease you mention, any commercial names?

When I was servicing the fuel filter I noticed that the connector on the fuel pump under the tank swiveled around. Is this normal?

This time when I go back in I'll remove the CO canister too.

Any other insights into this issue is much appreciated

Thanks mates

James M.
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post #8 of 24 (permalink) Old 05-11-2016, 06:52 AM
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sounds like faulty coil
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post #9 of 24 (permalink) Old 05-11-2016, 07:38 AM
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James,

Suggest you check the air sensor left side under the cheek.

Mine was faulty.sending the signal to ECU that air pressure was low so ECU consequently sent a reduced fuel flow from the injectors.....bike ran very lean as a result causing heat and rough running most noticeable at lower revs , momentary cutting out, and boy was it getting hot under the seat. I believe this contributed to a wiring melt at the tail of my bike,

Also as stupid as it sounds, make sure your battery connections are good as a loose ground wire for instance will cause cutting out //

Check it

Last edited by gotojoe; 05-11-2016 at 07:40 AM.
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post #10 of 24 (permalink) Old 05-11-2016, 01:55 PM Thread Starter
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Dielectric grease I found out is vaseline. Well lifted tank today and vacune lines were attached. It seems like it is one of those frustrating intermittent faults. Checked the routing of the wires from the fuel pump too and seemed ok. So then went out for a ride and all ok. Frustrating!
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