Random low idle then dies if left alone. - Ducati Monster Forums: Ducati Monster Motorcycle Forum
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  • 1 Post By beezwiz
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post #1 of 8 (permalink) Old 06-15-2016, 10:40 PM Thread Starter
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Random low idle then dies if left alone.

Ok, so recently I started my bike, let it warm up for about 15 seconds then it started going at a very low idle almost dieing then did actually shut off. Once I went onto the road and at the stoplight 50 yards away it idled normally.

It happens randomly, hasn't yet happened when the bike is warmed up but sometimes DOESN'T happen even when its cold.

Bad fuel pump?
-When it primes it sounds fine to me.

Clogged Fuel filter?
-Don't know since its inside with the fuel pump and if that was the case wouldn't it be choppy at constant moving RPM?

Bad coils/spark plug wires?
-?

Bad(ish) TPS?
-?

Bad spark?
-Spark plugs looks really good.

Also I've had my ECU tuned with my current mods awhile back and it was fine unless my ECU randomly changed its tune.

Bike has 26,500 miles

2012 Ducati Monster 796 Pearl White
Front LED parking light
CRG Hindsight LS bar ends
Mivv Suono Blacksteel/CF exhaust
Speedymoto Frame sliders
Monster tail chop
Shortened front turn signals/black headlight surround
Bikini Fairing delete/instrument cover add on
Motodynamic Integrated tail light

Last edited by Coyote07; 06-15-2016 at 11:54 PM.
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post #2 of 8 (permalink) Old 06-15-2016, 11:08 PM
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15 seconds?

You let the bike warm up for 15 seconds... that's not enough time to put on your gloves..
Do you use the throttle or the hi-idle lever to warm up to bike?
I warm my monster w/ the hi-idle lever for about 2 minutes while I put on the remainder of my gear, usually take off w/ the lever still pulled back about 1/2 way for the first 1/4 mile too. Never had a issue w/ the bike dying out.
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post #3 of 8 (permalink) Old 06-15-2016, 11:51 PM Thread Starter
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Quote:
Originally Posted by beezwiz View Post
You let the bike warm up for 15 seconds... that's not enough time to put on your gloves..
Do you use the throttle or the hi-idle lever to warm up to bike?
I warm my monster w/ the hi-idle lever for about 2 minutes while I put on the remainder of my gear, usually take off w/ the lever still pulled back about 1/2 way for the first 1/4 mile too. Never had a issue w/ the bike dying out.
Its 95 degrees out here so letting it warm up for longer isn't needed and I don't get on it until its well into the 2 temp bar range.

I have a 796 which has EFI, there is no choke on it and/or high idle lever.

2012 Ducati Monster 796 Pearl White
Front LED parking light
CRG Hindsight LS bar ends
Mivv Suono Blacksteel/CF exhaust
Speedymoto Frame sliders
Monster tail chop
Shortened front turn signals/black headlight surround
Bikini Fairing delete/instrument cover add on
Motodynamic Integrated tail light
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post #4 of 8 (permalink) Old 06-16-2016, 08:34 PM
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Have the valve clearance checked - it is very likely that the exhaust valve clearance`s have tightened up.
Ducati 2-valve engines are the only one`s that have valves loosen up when warm (tight when cold)
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post #5 of 8 (permalink) Old 06-19-2016, 05:33 PM Thread Starter
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Quote:
Originally Posted by Mister Ducati View Post
Have the valve clearance checked - it is very likely that the exhaust valve clearance`s have tightened up.
Ducati 2-valve engines are the only one`s that have valves loosen up when warm (tight when cold)
I feel if that was the problem it would happen all the time on every cold start up. Its random, not at every cold start up.

2012 Ducati Monster 796 Pearl White
Front LED parking light
CRG Hindsight LS bar ends
Mivv Suono Blacksteel/CF exhaust
Speedymoto Frame sliders
Monster tail chop
Shortened front turn signals/black headlight surround
Bikini Fairing delete/instrument cover add on
Motodynamic Integrated tail light

Last edited by Coyote07; 06-19-2016 at 10:38 PM.
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post #6 of 8 (permalink) Old 06-24-2016, 09:19 AM
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Quote:
Originally Posted by Coyote07 View Post
Its 95 degrees out here so letting it warm up for longer isn't needed and I don't get on it until its well into the 2 temp bar range.

Just curious... I let my 796 idle for about 4-6 minutes and it's never gone to 2 bars at idle/warmup. I even let it go 10 minutes once and it never came off 1 bar. Remember, it's not about ambient temperature (It's hot here in Texas, too...) it's about bringing the motor temp up...

FWIW, my 796 (stock ECU) will throttle a little wonky sometimes... when it's warming I'll blip the throttle... it will idle up for something like 10 seconds (almost like high-idle) and then drop to idle. It also can gag a little as I motor through the 'hood on the way out... I chock that up to a lean stock fuel map. In your case, with a modded map and the miles you have on it, I wouldn't rule out the fuel filter or sticky throttle cable... something like that.

Dennis

2013 M796 ABS in Artic White
1993 XR650L (the Torque-a-Saurus)
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post #7 of 8 (permalink) Old 06-25-2016, 07:28 PM Thread Starter
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What I mean't by "get on it" was the throttle, not literally get on the bike. As in, I don't get going spiritedly on the bike until its well into 2 bars.
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post #8 of 8 (permalink) Old 06-26-2016, 12:19 PM
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Well, if you have a throttle cable like my early 2103 796 M, I would first check the idle stop. Maybe it is just too low. Second, I would suspect the re-flash. Same thing on mine. Had someone else do it, who knew what they were doing.
Problem solved.
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