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K1100 LT ABSI 1993 - Trouble with Fuel pump Tue Dec 06, 2022 10:12 am
yumax
active member
Hello to every one,
May be with your help I can solve a mistery of fuel pump....and injecton....
I have a problem that I can't solve by my self, I'll try to explain:
For a while the bike, a K1100LT 93 ABSI, had ignition problems due to the fuel pump sometimes not starting.
Waiting a minute and turning off the ignition the pump was back to normal.
A few days ago, after a little trip, I turned off the bike and after half an hour, to go home, I tried to turn it on again but the bike didn't start anymore and still not working on.
When switched on, the whole panel lights up normally but the petrol pump does not start.
I thought it was burnt, so after disassembling it I tested it by feeding it with a battery and it works perfectly, by the way the pump is original from 1993. (65000km)
I then continued searching the fault, I disassembled the float and replaced it with a spare one I had, I checked and it worked perfectly and everything was fine at least by connecting the float directly to the battery it jumping the 4pin connector.
I reconnected the 4-pin connector and tried to restart again.. the pump remains silent, the float works and the reserve light also works well.
I started checking the electrical circuit and verified that:
1) the relay it works and closes the contact regularly.
2) fuse n°6 is fine
3) fuse n°1 is OK
4) voltage at the relay connectors is correct
5) kickstand switch it works.
6) Four-contact female connector (the one to be attached to the tank connector) has these values with the key inserted:
6.a) pin green-brown cable 11.8V
6.b) 12V white wire pin
6.c) the two remaining voltage 0 pins
Then I tried to unplugg the tank connector and making a bridge between the female and male pin of the green-brown cable and grounding the tank, and turning on the Killer switch, the pump turns on and runs for a few seconds then it stops as per normal operation.
Reconnecting the 4-pin connector pumps shows no signs of life.
I have read here and there on various forums that there could be interference from the various injection organs which would justify this failure due to blocked injectors or in any case lack of pressure in the injection circuit.....but all message was not complete about the end of histories.
I've come this far but now I don't know what to do.
Any suggestions??
Every comments are welcome!!
May be with your help I can solve a mistery of fuel pump....and injecton....
I have a problem that I can't solve by my self, I'll try to explain:
For a while the bike, a K1100LT 93 ABSI, had ignition problems due to the fuel pump sometimes not starting.
Waiting a minute and turning off the ignition the pump was back to normal.
A few days ago, after a little trip, I turned off the bike and after half an hour, to go home, I tried to turn it on again but the bike didn't start anymore and still not working on.
When switched on, the whole panel lights up normally but the petrol pump does not start.
I thought it was burnt, so after disassembling it I tested it by feeding it with a battery and it works perfectly, by the way the pump is original from 1993. (65000km)
I then continued searching the fault, I disassembled the float and replaced it with a spare one I had, I checked and it worked perfectly and everything was fine at least by connecting the float directly to the battery it jumping the 4pin connector.
I reconnected the 4-pin connector and tried to restart again.. the pump remains silent, the float works and the reserve light also works well.
I started checking the electrical circuit and verified that:
1) the relay it works and closes the contact regularly.
2) fuse n°6 is fine
3) fuse n°1 is OK
4) voltage at the relay connectors is correct
5) kickstand switch it works.
6) Four-contact female connector (the one to be attached to the tank connector) has these values with the key inserted:
6.a) pin green-brown cable 11.8V
6.b) 12V white wire pin
6.c) the two remaining voltage 0 pins
Then I tried to unplugg the tank connector and making a bridge between the female and male pin of the green-brown cable and grounding the tank, and turning on the Killer switch, the pump turns on and runs for a few seconds then it stops as per normal operation.
Reconnecting the 4-pin connector pumps shows no signs of life.
I have read here and there on various forums that there could be interference from the various injection organs which would justify this failure due to blocked injectors or in any case lack of pressure in the injection circuit.....but all message was not complete about the end of histories.
I've come this far but now I don't know what to do.
Any suggestions??
Every comments are welcome!!
K1100RS/LT - R1200RT - R1100RS - Cagiva SST 350 Ala Verde - K75LT project - K75 Schurgers - K75S - K1100RS - K75RT - K75C
