My 2003 GSA has had a slight misfire for ages now but only when on a closed throttle and rolling to a stop or when pulling away from a stop. It would always clear when throttle was applied and therefore was not an issue. However over the last couple of days it's got worse to the extent that riding home last night it would not pull at anything more than a barely open throttle and even pinning the throttle back made no difference and it just bogged down and struggled to rev over 4000 revs.
With Steptoes help last year it was diagnosed with a dodgy secondary coil which was replaced as were both stick coils and the TPS unit. I did add a bottle of injector cleaner the other day which I'm now wondering if this might have been a cause but it revs with no problems when not under load.
I'll try some fresh fuel over the next couple of days but wondered if the problem may have arisen with any if you and diagnosed any differently?
The fast idle lever feels a little stiff but both throttle cables are seated correctly and the stops are both closing properly.
With Steptoes help last year it was diagnosed with a dodgy secondary coil which was replaced as were both stick coils and the TPS unit. I did add a bottle of injector cleaner the other day which I'm now wondering if this might have been a cause but it revs with no problems when not under load.
I'll try some fresh fuel over the next couple of days but wondered if the problem may have arisen with any if you and diagnosed any differently?
The fast idle lever feels a little stiff but both throttle cables are seated correctly and the stops are both closing properly.

