R1100GS Really doesn't want to start

herbal thought

Member
UKGSer Subscriber
Joined
May 27, 2020
Messages
16
Reaction score
1
Location
Forest of Dean
R1100GS stat from early October until late Jan, uncovered in garden (I know i'm a tit). Charged up battery and turned her over but it wouldn't start. Fuel pump priming, pulled spark plugs and earthed out on engine and no spark. Read lots of forums and decided to change Hall Effect Sensor (90,000mile bike). Finished HES replacement and tried starting, got momentary start and then it died. Tried starting until starter got warm but didn't fire again. Took HES off again to make sure it was lined up against my scribes and the tab wasn't bent, all looked pukka. Left it overnight, charged up battery again, just sat outside trying to start it and after alot of cranks and some angry, choke/full-throttle FFS-king it fired and revved up and sounded like a bag of shit running on half a cylinder, then died...

Questions for you wisdomous oracles of the GS:

1) Is it fcuked?
2) Did I fit a duff HES?
3) Is maybe the wiring between the "new" HES plug and the ECU to blame?
4) Is it the coils or something else?
5) Is it fcuked?
6) Why would this happen to meeee?
7) It just sat there, wasn't on fire or given a kicking, just a normal winter outside in the elements! Whyyyyyyyyyy?

Help a brother out?
 
Nice winter home for rodents…….. :nenau

Have you checked the other basics:-
Air
Fuel
Air is airing. Fuel pump is priming and there is fuel in the lines..... should I just unplug the injectors from the TB's and let them dangle while starting to see if they squirt fuel?
 
I have good squirt on both injectors, nice cone.

Somethings I noticed. Whilst cranking (injectors swinging in the wind) I was getting some back pressure out of the injector hole in the TB

and (possibly more important) I just noticed that my clock had reset... I reconnected the injectors and watched the clock and while cranking the RID went blank and the clock reset at the same time there was a backpressure "pop" sound from wiithin the bike....


...... am I ruining it?
 
Clock resetting during cranking is a usual indicator of high current draw from the battery. Either poor battery or short circuit across starter motor. The remaining voltage may not be enough for the ignition system to work.

Try a jump battery if you have one during start.

The back pressure from the throttle body injector is a mystery. Is your exhaust blocked?
 


Back
Top Bottom