Misfiring? 1100s please read help req

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mincer
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Joined: Fri Feb 24, 2017 10:28 pm
Location: Ealand , N.Lincs

Misfiring? 1100s please read help req

Postby mincer » Mon Nov 19, 2018 1:46 pm

Hi Guys any help or advise would be grateful.
Ok bike spec 1100s 99 v plate ,34 thou miles VDL exhaust and chip , brisk plugs , lennies air scoop and k&n , oils etc in order recent change, .went out for a tootle sunday after 5 miles out and bike begins to miss , opened her up to see if this would clear it , no cigar got worse to a point were the bike was loosing power / cutting out and popping more than the usual vdl exhaust noise . Got her home.no warning lights.
Tank off , plugs out look ok , plenty of fresh fuel no loose wires or anything to say what the issue is.
Answers on a postcard , going to have a trawl thru issues posted previous but if anyone has had this issue mail me .
Thanks in advance
Dave

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Blackal
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Re: Misfiring? 1100s please read help req

Postby Blackal » Mon Nov 19, 2018 2:08 pm

One stick-coil breaking down?

Was it old fuel before topping up with fresh?

Still misfiring on new fuel?
If I am ever on life support - Unplug me......
Then plug me back in..........

See if that works .....
:?

mincer
Posts: 32
Joined: Fri Feb 24, 2017 10:28 pm
Location: Ealand , N.Lincs

Re: Misfiring? 1100s please read help req

Postby mincer » Mon Nov 19, 2018 2:31 pm

Hi ,
No the "old" fuel was fairly fresh went to cadwell the other week and was running ok then.
As for coil other than having a specific test not sure got a feeling it is ignition side before pulling things off and replacing eh oh.
Mines a 99 model so the coils are under the tank

mincer
Posts: 32
Joined: Fri Feb 24, 2017 10:28 pm
Location: Ealand , N.Lincs

Re: Misfiring? 1100s please read help req

Postby mincer » Mon Nov 19, 2018 3:33 pm

just been reading other posts re rough running /misfiring , going to check the fuel tank re poss water ? and clean the injectors as required ,of course any comments welcome

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nab 301
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Location: Dublin Ireland

Re: Misfiring? 1100s please read help req

Postby nab 301 » Wed Nov 21, 2018 7:53 pm

Difficult to diagnose but If you're going to check for water in the tank , change the fuel filter while you're there . After that it's really just methodical checking . Do a quick visual check for the small rubber blanking plugs under the throttle bodies on the vacuum take offs. ( one might be missing) Also the rubber inlet manifolds cracked badly on my bike a few years ago so I replaced them although bike was fine at the time) After that check the resistance of the plug leads just to be sure , if original they're nearly 20 yrs old , also it seems to happen more on GS's but make sure one of the throttle cable outers isn't unseated , if you open and close the throttle with the engine off you'll hear if the throttles are hitting the stop screws at different times when closing .
After all that I'd be doing a compression check/ check valve clearances just for peace of mind. I'd change plugs after all that just to see ?
After all that I think someone on here had a fuel pressure regulator problem ( sticking open I think?)
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Nigel

Keep smiling, it makes people wonder what you've been up to!
1999 R1100s (mandarin) '
2018 DL 250V Strom
2019 CB125F Honda.
MZ301 Saxon Fun ( currently retired)
'03 Bullet 65 project..

mincer
Posts: 32
Joined: Fri Feb 24, 2017 10:28 pm
Location: Ealand , N.Lincs

Re: Misfiring? 1100s please read help req

Postby mincer » Thu Nov 22, 2018 3:34 pm

Thanks for the info , on with filter at present and will check those you have mentioned.
:-)

Jeff Highland
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Re: Misfiring? 1100s please read help req

Postby Jeff Highland » Thu Nov 22, 2018 7:50 pm

While you are in the tank, check the U-tube for splits and tight fit on the barbs. Mine had deteriorated so it was loose (only showed when wet, tightened up when it dried)

ted
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Location: Leeds, United Kingdom

Re: Misfiring? 1100s please read help req

Postby ted » Thu Nov 22, 2018 10:44 pm

its easy to dismiss the simpler things. Start your diagnosis from a solid base - replace the plugs with brand new ones otherwise you can do lots of work when the plugs are at fault.

mincer
Posts: 32
Joined: Fri Feb 24, 2017 10:28 pm
Location: Ealand , N.Lincs

Re: Misfiring? 1100s please read help req

Postby mincer » Mon Nov 26, 2018 4:32 pm

Hi ,
thanks for your replies , so checked pipework etc all ok, plugs good, spark good , fuel filter changed always a faff job but its done now , cleaned residue out of tank all ok , injectors cleaned and checked ok ,fresh fuel ,back together and taken for a shakedown without the bodywork on .
Started noted tickover too low , ran ok but started to fluff on part throttle between 2-3 thou it was noticeable , but not misfiring ,baulking as previous , took a look at you tube poss requiring idling set up ? to solve issue so I don't have the gauges so a trip to the dealer or anyone know a good ind mechanic in North Lincs .
Thanks Again for your input.
Dave

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nab 301
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Location: Dublin Ireland

Re: Misfiring? 1100s please read help req

Postby nab 301 » Mon Nov 26, 2018 9:52 pm

I can't help with a local mechanic but joking aside if you've no vacuum gauges you can make a manometer with some clear tubing , oil, and a piece of timber . To speed up the idle you can open the large brass air screw on each throttle body an equal amount as a temporary measure.
If you do decide to balance the throttle bodies yourself, it's best to check the valve clearances first, as these can have a bearing on the balance.


ImageDSCF07922 by Nigel Burgess, on Flickr
_________________
Nigel

Keep smiling, it makes people wonder what you've been up to!
1999 R1100s (mandarin) '
2018 DL 250V Strom
2019 CB125F Honda.
MZ301 Saxon Fun ( currently retired)
'03 Bullet 65 project..

fizzerian
Posts: 10
Joined: Fri Mar 03, 2017 8:57 pm

Re: Misfiring? 1100s please read help req

Postby fizzerian » Wed Jan 30, 2019 1:33 pm

sounds like a hall sensor issue


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