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1Back to top Go down   Issue after Fuel line replacement Empty Issue after Fuel line replacement on Mon Mar 02, 2015 5:18 am

elukros

elukros
active member
active member
Hello,
I had to change the fuel lines on my K1100RS, as the old ones showed little cracks on the surface.
After this renewal, I have no fuel coming to the injector rail.
Checked the fuel pump, delivers 2,5 bar and runs when I turn the ignition key on and the kill switch off.
Made the connections as follows:

From the gas tank (fuel pump outlet) to the pressure regulator (central pipe),
Issue after Fuel line replacement Pressu10
From the pressure regulator (side pipe) to the injector rail.
From the injector rail to the gas tank (pipe of the return line).
No vaccuum line on the pressure regulator (not foreseen)

Issue after Fuel line replacement Inject10

My question is how can I figure out what's the inlet side and the outlet side of the pressure regulator, no arrows or indication on it.
Did I swap the connection of the fuel pump line and the return line on the gas tank?

Thanks for helping me out,
Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

2Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 5:36 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Are you 100% happy with the routing of the pipes in that photo?

I am more familiar with the K100 and not the K1100 but I had thought the pipe routing would be fairly similar. The one on the left of the infector rail [marked to regulator] is down against the cylinder head which does not strike me as ideal, its very close to the hot head.

On the K100 2 valve that pipe is vertical and goes straight up to a spigot on the gas tank. The right hand pipe on the fuel rail []nearest your foot] goes back to the fuel pressure regulator and from there to the petrol tank. Not sure if its the same on the K1100.

I don't have the Clymer near me just now to check.


__________________________________________________
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 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

3Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 5:46 am

Holister

Holister
Life time member
Life time member
Looks a bit arse about to me... but i'm not familiar with the 1100
- Line from the fuel pump looks to be going to the regulator.
- Return line from the rail should go to the regulator but looks like its heading off to the tank.
- Fuel line to the rail is coming from the regulator.
This doesn't look right.
....if you've labelled the photo correctly???



Last edited by Kaptain Holister on Mon Mar 02, 2015 5:49 am; edited 1 time in total


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1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
 Issue after Fuel line replacement Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

4Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 5:48 am

Inge K.

Inge K.
VIP
VIP
First the FPR must be after the rail (or else you have operating pressure only in
the hose between the tank and FPR).

And the flow goes in the opposite direction to the arrows in the picture of the FPR.

If you swap the hoses at the tank it gonna be correct.



Last edited by Inge K. on Mon Mar 02, 2015 5:55 am; edited 1 time in total


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

5Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 5:55 am

elukros

elukros
active member
active member
Inge,
I connected the FPR just after the fuel pump.
It's becoming clear to me that the FPR should be after the injector rail.
The FPR is blocking fuel going to the injector rail the way it is connected now.
I'll swap the return line and the fuel pump line on the gas tank.
Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

6Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 6:02 am

elukros

elukros
active member
active member
Olav,
I'm aware that the line on the left hand side of the Injector rail is making contact with the engine block.
I tried to re-route this line, but couldn't find an alternative.
It seems that it's meant to be connected lile this.

Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

7Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 6:05 am

elukros

elukros
active member
active member
Kaptain Holister.
The arrows I drew on the picture is how I made the connections, and represent the way the fuel will flow.

Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

8Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 6:40 am

elukros

elukros
active member
active member
Hey guys,

Thanks a lot for your support. I swapped the fuel pump hose and the return hose at the gas tank, as Inge suggested.
Guess what, the bike started after 5 sec, the time to fill the injector rail with fuel.

Gratitude,
Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

9Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 6:56 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Luk

That's great is going now, but will you put up a photo of what's there now. I am worried about that fuel line down against the engine.

Don't want anything to happen to you!

Olaf


__________________________________________________
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 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

10Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 7:23 am

elukros

elukros
active member
active member
Olav,
Thank you for being concerned about my safety.
This is how the hoses are connected after correction:
Issue after Fuel line replacement Inject11

I consider wrapping some insulation cloth (the one some people wrap around exhaust pipes) over that hose.
Just to prevent the rubber to burn. Normally if my cooling system is working correctly, the engine block shouldn't exceed a temperature of 95°C.
What do you suggest? Is there an other way to route this hose?

Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

11Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 7:46 am

RicK G

RicK G
VIP
VIP
That is the correct place for the fuel line you may wish to put some insulation on the hose if heat in the fuel tank is a problem, in Europe I doubt it would be any problem.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


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

12Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 8:02 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
We don't get too much heat up here even in our summer. But in mainland Europe we can see 35-40c in summer. I know the fuel hose is good stuff and was just concerned it might not be in the correct position.

Now its a case of go get on the K and enjoy it!


__________________________________________________
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 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

13Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 8:12 am

elukros

elukros
active member
active member
Rick G,

Never had issues with fuel being extremely hot in the tank, in Belgium summer temperatures seldom exceed 35°C.
I draped the bottom of the tank with insulation sheet. Some kind of aluminium foil used on the firewall of cars, that helps a lot preventing the tank from heating up.
Didn't notice that the Injector rail return hose made contact with the engine block until Olav drew my attention to it. For my peace of mind I'll put some insulation tape around it.

Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

14Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 8:29 am

RicK G

RicK G
VIP
VIP
I insulated mine and run a small cooler in front of the radiator but the only drawback with that is the tank stays cool in winter so my knees don't get warm. Win a few lose a few Smile


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


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   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 9:07 am

elukros

elukros
active member
active member
Rick G,
I was wondering. Does fuel temperature affect the richness of the mixture?
Isn't that compensated by the Motronic (or in your case the L-tronic)

Luk


__________________________________________________
K1100 RS ABS II 08/1993

Issue after Fuel line replacement Be-log10
    

16Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Mon Mar 02, 2015 7:06 pm

RicK G

RicK G
VIP
VIP
Only to a VERY small degree, it's the air temp that makes a difference to performance in that cool air is denser so more can go into the cylinder which makes for a bigger bang.
The motronic does compensate for mixture with changes of temperature but the L-Jetronic has no means to do it.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


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

17Back to top Go down   Issue after Fuel line replacement Empty Re: Issue after Fuel line replacement on Tue Mar 03, 2015 3:33 am

charlie99

charlie99
VIP
VIP
there is a air temp thermistor on the intake of the afm on le-jetronic ( 2 valve systems ) systems

 Issue after Fuel line replacement 2013-014

and wired as a separate entity  to the under seat computer

Issue after Fuel line replacement EFI-Motronic%20schematic

but no fuel temp sensor at all


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OIssue after Fuel line replacement Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

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