sleeves
Nitrous
Over the last few months @Paul Bryant s bike has developed an odd idling issue we have been trying to resolve and its now time to ask everyone. On load it also feels "heavy"
The obvious has been tried, TPS ISCV rest and correct, MAP lines all good, new plugs, cleaned air filters, throttles are balanced even replaced leads and checked all coils. We reloaded the Hanso Tune ECU map from my bike to is. Reset the PCV to Hansos base map and removed all trims from the AT. Tested ISCM cycles fine.
This made no difference.
Yesterday we moved my POD300 onto his bike and put my bike on the computer linked to to the PCV to make some comparisons as my bikes running sweet.
At idle his bike is running 11:1AFR that drops to 10:1 and splutters (obviously too rich to burn clean). My bike AFR was 13:1 idle and dropped to 12:1 but was clean. The rich AFR was also consisten with the squirt of unburnt fuel coming out exhaust. We used the POD300 to lean out the fuel on the PCV till we got similar AFR to my bike and it idled better.
However we also noticed the Pauls bike was idling at around 650 to 700 rpm. Tune ECU we then set to run at 1100rpm at above 70degC (as a test) loaded map and it still stayed around 700rpm.
Reset TPS and ISCV, this made no difference it jumped for a few seconds to around 1000 then settled back to 700. After the reset and idle setting increase I manually tweaked the ICSM nut to increase the RPM but it simply cycled back to 700. Its also quite unstable and trying to stall out.
I think if we can sort the idle setting we'll have the problem licked.
What sets the bikes idle settings?, thought it was the temp settings on Tune ECU (works on my bike). I recall reading a post (possible by @warp9.9) that No.1 cylinder has an idle screw that can effect the bike idling and when balancing you only adjust 2&3? but I'd stand corrected on that. Could this be the issue and do we need to tweak this?
The obvious has been tried, TPS ISCV rest and correct, MAP lines all good, new plugs, cleaned air filters, throttles are balanced even replaced leads and checked all coils. We reloaded the Hanso Tune ECU map from my bike to is. Reset the PCV to Hansos base map and removed all trims from the AT. Tested ISCM cycles fine.
This made no difference.
Yesterday we moved my POD300 onto his bike and put my bike on the computer linked to to the PCV to make some comparisons as my bikes running sweet.
At idle his bike is running 11:1AFR that drops to 10:1 and splutters (obviously too rich to burn clean). My bike AFR was 13:1 idle and dropped to 12:1 but was clean. The rich AFR was also consisten with the squirt of unburnt fuel coming out exhaust. We used the POD300 to lean out the fuel on the PCV till we got similar AFR to my bike and it idled better.
However we also noticed the Pauls bike was idling at around 650 to 700 rpm. Tune ECU we then set to run at 1100rpm at above 70degC (as a test) loaded map and it still stayed around 700rpm.
Reset TPS and ISCV, this made no difference it jumped for a few seconds to around 1000 then settled back to 700. After the reset and idle setting increase I manually tweaked the ICSM nut to increase the RPM but it simply cycled back to 700. Its also quite unstable and trying to stall out.
I think if we can sort the idle setting we'll have the problem licked.
What sets the bikes idle settings?, thought it was the temp settings on Tune ECU (works on my bike). I recall reading a post (possible by @warp9.9) that No.1 cylinder has an idle screw that can effect the bike idling and when balancing you only adjust 2&3? but I'd stand corrected on that. Could this be the issue and do we need to tweak this?