1 Rough Running 1997 K1100LT Tue Mar 17, 2015 5:25 pm
mike d
Life time member
This is to help another BMW Club UK member.
1997 K1100LT, bought on a whim!
The bike starts easily and at idle sounds perfect.
Go for a spin and it starts to run rough (on 3 cylinders). each time it seems to be number 4 plug fouled up/flooded.
Jobs performs so far:
Compression check - Good
It has a new fuel pump and fuel filter.
The injectors were checked and showed to have a similar spray pattern.
Throttle bodies balanced.
Fuel pressure checked and seems o.k.
New plugs fitted.
Replacement plug leads & coils (from my known good K1100)
Replaced TPS (From my known good K1100)
ECU swapped out (as above)
Electrical connections to ECU, coil etc. checked and cleaned (but not found to be bad anyway.
The Hall sensor has been changed and ignition retimed (on the original the timing was out). Since then the old hall sensor has been refitted with no improvement.
I have measured the resistance of the coolant sensor from the ECU cable connector. This is different pins to the K100, but all seemed o.k.
I have requested he check the valve clearances, and swap over the injector from number 4.
Any more ideas?
Mike
1997 K1100LT, bought on a whim!
The bike starts easily and at idle sounds perfect.
Go for a spin and it starts to run rough (on 3 cylinders). each time it seems to be number 4 plug fouled up/flooded.
Jobs performs so far:
Compression check - Good
It has a new fuel pump and fuel filter.
The injectors were checked and showed to have a similar spray pattern.
Throttle bodies balanced.
Fuel pressure checked and seems o.k.
New plugs fitted.
Replacement plug leads & coils (from my known good K1100)
Replaced TPS (From my known good K1100)
ECU swapped out (as above)
Electrical connections to ECU, coil etc. checked and cleaned (but not found to be bad anyway.
The Hall sensor has been changed and ignition retimed (on the original the timing was out). Since then the old hall sensor has been refitted with no improvement.
I have measured the resistance of the coolant sensor from the ECU cable connector. This is different pins to the K100, but all seemed o.k.
I have requested he check the valve clearances, and swap over the injector from number 4.
Any more ideas?
Mike