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1Back to top Go down    Fuel pump / fuel rail on Fri Jul 28, 2017 11:40 pm

Cablebeacher


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Hi all

I have just read Frogs wonderful troubleshooting pages on fuel injection etc and now my head really hurts!

I have had all the major fuel tank issues resulting in a new fuel pump. In-tank it works i.e. spurts fuel.

Q1. If I take the fuel line off at the Injector rail should fuel come out ? OR should it only come out when I hit the start button? It is currently running out slowly?

I am working my way down the line as the tank had the dreaded pump rubber disintegration and some of it may have worked its way into the system.

Next is to remove the rail and see if fuel comes out there. Then take out the injectors and do the same...

Q2. Would it be likely/possible the fuel regulator could be blocked? Or would a new pump push rubber bits through the system?

Thanks for all the help I know I am going to get on this one! This is the best forum ever when you are about to hit your head with a brick...

Mal

    

2Back to top Go down    Re: Fuel pump / fuel rail on Sat Jul 29, 2017 1:29 am

Two Wheels Better

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Mal, longtime mate! I remember running into you whilst dropping off a girlfriend at the airport in Broome back in 2010 on my Long Ride Round. She's long gone, but I've still got my trusty ol' K100RS.

When you pull off a fuel hose at the rail or remove the rail there will be a significant spray of fuel, not just a dribble. That is unless the fuse for the fuel pump has been pulled prior to switching off a running engine. Since you've replaced the fuel pump this means the system has been depressurised. Is the fuel filter new? Have you cleaned out or replaced the hoses to everything, including the FPR? I'd suspect rubber bits in the internals. Give everything a good hosing out with carbie cleaner and see how you go.


__________________________________________________
1987 K100RS, '93 K11/K12 hybrid 'Big Block', '09 K1300GT, '07 K1200R, '04 R1150RT, '95 R100 Mystic, '77 R75/7.
Have we accomplished half of what we dreamt we would? There may still be time.
    

3Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 4:18 am

rawdonball

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Hi Mal - glad to hear there is a forum member up in Broome as I'm hoping to get up that way before too long. Last year we got as far as Exmouth before my road trip pals decided they wanted more time on the beach and less on the saddle! I have a couple of ex Southern African school mates who have ended up as permanent Broome residents...
In the past when I've had fuel pump damper desolving problems, I haven't bothered about flushing the fpr and it hasn't yet been an issue (to my knowledge). If you want to play it safe, it would make sense to delay reconnection of the fpr to tank fuel bleed off line until you have recommissioning the pump following a tank clean out. This way you could check that your pump is still delivering excess capacity even at wide open throttle condition and you can continue running the fuel bleed off volume into a clear glass container until you are sure that the fpr has been flushed clean of debris.


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'88 K100RT, '86 K75C, '05 Yamaha TTR250
    

4Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 4:51 am

duck

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The fuel filter is on the output from the fuel pump so I don't see how any fuel pump, new or not, could push rubber bits out of the tank to the fuel rail.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

5Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 1:29 pm

MartinW

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If you don't use the correct type of fuel line before and after the fuel filter it can break down. A mate had a problem with cheap fuel line breaking down between the tank and the fuel rail. I couldn't find any rating marks on it. 
Regards Martin.

    

6Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 2:29 pm

92KK 84WW Olaf

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Very important to use the correct fuel lines. Also, the one for inside the tank has to be suitable to in tank use because it must be resistant to petrol on inside AND the outside, standard fuel line is not resistant to petrol from the outside other than short spillages.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 82,800 miles
    

7Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 3:48 pm

Chocolate

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Hello!

Do not use the wrong fuel lines inside the tank !!!
The result is awful, sticky and hard to clean.

Outside the tank use:
Size: inside Ř: 8,0mm outside Ř: 14,0mm  
inside NBR (Perbunan BuhnaN, Butadien-Acrylnitril- Kautschuk), 
outside CR (Neopren)
This is for outside the tank.

Inside the tank you will need:
NBR inside and NBR outside!






NBR is gasoline resistances 


Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

8Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 4:07 pm

duck

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I just buy the BMW fuel line for inside of the tank: Part 16121180040


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

9Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 4:10 pm

92KK 84WW Olaf

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@duck wrote:I just buy the BMW fuel line for inside of the tank: Part 16121180040

I also use the BMW lines for inside and outside the tank, simple and no chance of getting it wrong.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 82,800 miles
    

10Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 4:11 pm

Chocolate

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Right, as BMW told me that they only have on fuel line.
That is NBR NBR for inside, so good to use outside.


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

11Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 5:30 pm

duck

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I don't know who told you what but that is the BMW part number for the internal fuel line. It is used in K bikes as well as some R bikes and cars.

http://www.realoem.com/bmw/enUS/partxref?q=16121180040

I've been using it for years in all of my bikes.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

12Back to top Go down    Re: Fuel pump / fuel rail on Sun Jul 30, 2017 9:37 pm

RicK G

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VIP
VIP
Any how back to the original subject. I doubt that any bits of the damper or hoses got into the FPR. The correct line is

"SAE30R10" 8mm which will be available in Broome. The auto shop I usually deal with has only the SAE30 as it will do for all the applications the SAE20 was used for as well.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

13Back to top Go down    Re: Fuel pump / fuel rail on Sun Aug 13, 2017 1:32 am

Cablebeacher


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Silver member
Hi all

Well the beast is back on track...

Replaced fuel hoses, filter, fuel pump. Rebuilt injectors, replaced vacuum hose. Checked the valve clearances - they were spot on so no need for shims!

Took a while to get fuel through the system and I was about to give up but she fired up and runns better than ever.

I am trying to balance the butterfly etc but my ebay home made system keeps trying to suck the auto trans fluid up into the system. I am adding baffles of plastic to try and restrict the airflow/vacuum.

Thanks again for all the words of help and encouragement from everyone.

Apparently my BP fuel is the culprit of my woes. I am going to investigate fuel conditioner...

Regards

Mal

    

14Back to top Go down    Re: Fuel pump / fuel rail on Sun Aug 13, 2017 2:02 am

RicK G

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VIP
VIP
I have used the drip irrigation control taps for that purpose. They weren't perfect but did the job and I think something like 20c each.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

15Back to top Go down    Re: Fuel pump / fuel rail on Sun Aug 13, 2017 4:56 am

MartinW

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Fish tank valves are another source of restrictors.
Regards Martin.

    

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