Loomin hell

[follow me]

A hall sensor on the way out? unless it's misfiring I wouldn't think its that personally. They work or they don't. Maybe lambda? Have you changed that? Is it ok under acceleration on the flat/downhill? Popping on overrun? HT Leads? What do the plugs look like?

We have changed the lot, put in a new hall sensor on Monday. Ad if anything it ran worse. New coil ht leads, spark plugs. Timing, balanced the carbs. Tappets. Fuel pressure. Injectors. ICU..... All swapped over from a well running bike. Does it have a lambda..?

Spark plugs were black when I changed them. Then Steve changed them again and they looked normal colour.

On acceleration it's not surging, just cutting in and out. It's a real danger...powered on and off totally uncontrollable. It's hell going round a bend. For an 1100 my C90 is quicker and easier to ride.

It's allot worse going up a hill, really struggles to the point where I think it's going to break down. It's like a coil is going but it's not.

 

[follow me]

Sorry but does this look like a cure..??

Carbs on a GS ?

http://www.ukgser.com/forums/showthread.php?t=263923

 

[TangibleSolid]

weird running,surging, cutting out...

hi folks
I don't know if this helps but I had similar problems to the ones above with my 02 GS about a year ago.

It was main dealer diagnosed as the TPS being banjaxed, so I replaced it but...no difference, so I went back to the mechanic (not happy)...
To cut a long story short, it turned out to be a broken wire in the wiring loom to the TPS approx. 2-3 inches from the TPS itself. (so the original diagnosis was correct, sort of)
The break occurred where the wiring had been loosely secured to the bottom of the throttle body. Over the years the wire had rubbed against the throttle body and finally broken.
With the broken wire in the loom the TPS was sending an intermittent signal to the ecu which was causing the fueling to 'be all over the place' and most of the time in 'limp home mode'

Carefully opening the loom and a good soldered repair totally cured all the issues.

Maybe the problem is this simple...worth a look at least

Cheers

 

[Ian J Hartley]

I'm wandering if your problem isn't a fuel pressure regulator. There has been a few of these recently. It all depends on how you checked the fuel pressure, if you just checked pump pressure then with a faulty pressure regulator most of the fuel is returned to the tank and not enough getting to the injectors. This could course some of your symptoms.

If you have fuel QR fitted and they have check valves, you could disconnect the return line ( top hose ) and run your bike. This will give full fuel pressure at the injectors. Bike will run rich. This check comes with it's risks of course full fuel pressure etc, proceed with caution.

 

[follow me]

I'm wandering if your problem isn't a fuel pressure regulator. There has been a few of these recently. It all depends on how you checked the fuel pressure, if you just checked pump pressure then with a faulty pressure regulator most of the fuel is returned to the tank and not enough getting to the injectors. This could course some of your symptoms.

If you have fuel QR fitted and they have check valves, you could disconnect the return line ( top hose ) and run your bike. This will give full fuel pressure at the injectors. Bike will run rich. This check comes with it's risks of course full fuel pressure etc, proceed with caution.

That does make sence, pressure but not flow.. As my Doctor said.