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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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 Posted: Thu Mar 28, 2013 8:13 am Post subject: Starting issues |
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My 1994 k1100rs, 31k on the clock is a pig to start if its been left, even overnight especially in the cold, it always catches eventually but just doesn't fire quickly and certainly much longer than it should be, the fuel pump works I keep the 'choke' at the halfway point, battery is always fully charged, I leave the throttle alone as always but it's just a pig to fire up. Any ideas?
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Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
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Number 6
Flying Brick Rider
Joined: 05 Feb 2011
Posts: 481
Location: Paris area, France
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| Posted: Thu Mar 28, 2013 12:38 pm Post subject: |
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Check your fuel filter and sync the throttles.
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I am not a number, I am a free man.
94 K1100LT |
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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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| Posted: Thu Mar 28, 2013 12:57 pm Post subject: |
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Hi cheers, fuel filter less than a year old, I synch throttles regularly, once it fires it runs like a dream.
_________________
Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
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RAL88
Flying Brick Rider
Joined: 28 Apr 2004
Posts: 736
Location: New Mexico Land of Enchantment and 365 days of riding USA
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| Posted: Thu Mar 28, 2013 1:21 pm Post subject: |
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I had a fuel filter clog after 500 miles because of a bad tank of gas. That's why I carry a spare.
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Rich
"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R |
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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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| Posted: Thu Mar 28, 2013 1:55 pm Post subject: |
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I'll change it then but wouldn't it give other symptoms? Intermittent running etc.
_________________
Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
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| Back to top |
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RAL88
Flying Brick Rider
Joined: 28 Apr 2004
Posts: 736
Location: New Mexico Land of Enchantment and 365 days of riding USA
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| Posted: Thu Mar 28, 2013 2:41 pm Post subject: |
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I found it only gave me trouble when I started. Once it got flowing and the pressure was up it ran but not as good as it had been. It took me a while to figure it out because I had just changed the filter and I thought it couldn't be that.
_________________
Rich
"If it ain't broke, take it apart and make it work better"
*************
'96' K1100LT-SE
'97' R850GS-R |
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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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| Posted: Thu Mar 28, 2013 3:21 pm Post subject: |
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Well definitely worth a try then thanks.
_________________
Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
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| Back to top |
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whyoldbill
Flying Brick Rider
Joined: 12 Jun 2006
Posts: 440
Location: in the boonies, northwest of Columbus, Ohio
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| Posted: Thu Mar 28, 2013 6:26 pm Post subject: |
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2 ways to rule out that possibility:
1. Check the fuel pressure on the fuel rail, turn the key on with the bike on the center stand and the side stand up (kill switch in the on position). Should be about 60 lbs, 40 lbs with key off, if memory serves correctly.
If you don't have a fuel pressure test gauge, try the next suggestion.
2. Po' man's check: (again, bike on center stand, side stand up) Cycle the key (or the handle bar kill switch) off and on 3 or 4 times (wait for the fuel pump to stop before turning key off). This will (or should) fully pressurize the fuel rail. If she fires right up after doing this, that filter could be plugged, the fuel pump could be weak, or the fuel pressure regulator could be on its last legs...
my $.02
Bill
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'02 - GL1800
The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton |
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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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| Posted: Sat Mar 30, 2013 1:45 pm Post subject: |
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| whyoldbill wrote: |
Po' man's check: (again, bike on center stand, side stand up) Cycle the key (or the handle bar kill switch) off and on 3 or 4 times (wait for the fuel pump to stop before turning key off). This will (or should) fully pressurize the fuel rail. If she fires right up after doing this, that filter could be plugged, the fuel pump could be weak, or the fuel pressure regulator could be on its last legs...
my $.02
Bill |
I tried this today, temp was a cool zero degrees and yes she fired up right away, so I think I'll change filter first as that's the cheapest option, would the other 2 possibilities provide any other symptoms do you think? I only ask coz the bike, once started runs perfectly. Thanks so far.
_________________
Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
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| Back to top |
|
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whyoldbill
Flying Brick Rider
Joined: 12 Jun 2006
Posts: 440
Location: in the boonies, northwest of Columbus, Ohio
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| Posted: Sat Mar 30, 2013 10:12 pm Post subject: |
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| k11pfc wrote: | | would the other 2 possibilities provide any other symptoms do you think? |
Usually when the regulator is bad, the spark plugs will be rather black, instead of the normal ash/grey color. You can also smell "petrol" in the oil if the diaphragm is leaking badly.
If the fuel pump is weak, your acceleration would be poor. It might stall on you. Your spark plugs could be more white than grey (running really lean).
Those are the things I'd look at if the filter (most likely culprit) doesn't change the symptoms, but I'm no mechanic. I just try to impersonate one in my garage
_________________
'02 - GL1800
The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton |
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k11pfc
Mad Brick Rider
Joined: 04 Mar 2011
Posts: 104
Location: Portsmouth, United Kingdom
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| Posted: Sun Mar 31, 2013 2:41 am Post subject: |
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Thanks for your help mr mechanic impersonator, I'll change filter and see what happens.
_________________
Riding a 1995 Marakesh red K1100rs
Formerly owned:-
1 k1100rs
2 k100rs's
2 K1200rs's
2 F650's
2 R1200gs's
1 K1200s's
Play up Pompey |
|
| Back to top |
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BMGraeme
Flying Brick Rider
Joined: 14 Mar 2006
Posts: 373
Location: Marlborough, United Kingdom
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| Posted: Sun Mar 31, 2013 6:28 am Post subject: |
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Don't forget there's a fuel sock fitted on the input side of the fuel pump. You have to take the pump out to get at it. Having just done that on my '94 RS I found that filter to be very dirty and could have starving the pump. I ended up fitting a secondhand pump off ebay because mine was very noisy, together with a new fuel sock and its all running fine now - any very quiet as well.
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1980 CB900FA
1994 K1100RS
2008 R1200GSA |
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