Unreliable engine starting?
#70
Hard to tell if it did anything beacuse it was awesome ( warm ) here today and the motor takes long to cool off.
I notice that my motor goes into like fast idle every time I start it at least for a few secs even if it is fully warm.
Can that be changed so that it does not race as much once the engine is hot ?
Thanks
#73
Crank/Warmup - After Start Enrichment settings - Use fixed ASE/MAP when coolant below (???)
So basically, when your coolant is hotter than your specified temp, it WONT use the fixed MAP period.
Even though you think you are starting the engine while it is still hot, the coolant is likely dropping back into the zones of triggering ASE and fixed MAP values, especially if your running the PnP coolant temp value which is high at 80degC. Remember your coolant while the engine is fully warmed up is going to ~95degC, it'll only take 10-15 mins for that to drop back to under 80degC when the engine is shut off and trigger your fixed MAP setting.
So basically, when your coolant is hotter than your specified temp, it WONT use the fixed MAP period.
Even though you think you are starting the engine while it is still hot, the coolant is likely dropping back into the zones of triggering ASE and fixed MAP values, especially if your running the PnP coolant temp value which is high at 80degC. Remember your coolant while the engine is fully warmed up is going to ~95degC, it'll only take 10-15 mins for that to drop back to under 80degC when the engine is shut off and trigger your fixed MAP setting.
#74
Crank/Warmup - After Start Enrichment settings - Use fixed ASE/MAP when coolant below (???)
So basically, when your coolant is hotter than your specified temp, it WONT use the fixed MAP period.
Even though you think you are starting the engine while it is still hot, the coolant is likely dropping back into the zones of triggering ASE and fixed MAP values, especially if your running the PnP coolant temp value which is high at 80degC. Remember your coolant while the engine is fully warmed up is going to ~95degC, it'll only take 10-15 mins for that to drop back to under 80degC when the engine is shut off and trigger your fixed MAP setting.
So basically, when your coolant is hotter than your specified temp, it WONT use the fixed MAP period.
Even though you think you are starting the engine while it is still hot, the coolant is likely dropping back into the zones of triggering ASE and fixed MAP values, especially if your running the PnP coolant temp value which is high at 80degC. Remember your coolant while the engine is fully warmed up is going to ~95degC, it'll only take 10-15 mins for that to drop back to under 80degC when the engine is shut off and trigger your fixed MAP setting.
Thank you very much ! I'll try it.
Today I also want to play with the AE to take advantage of a VTPS that I installed a while back.
#78
If you datalog a start you'll see that for the first few seconds after start it continues to use the cranking DC for the idle valve. So if you set the cranking DC setting lower it wouldn't race as much after start, but it might also not start as well... So might just be something you need to live with.
#79
If you datalog a start you'll see that for the first few seconds after start it continues to use the cranking DC for the idle valve. So if you set the cranking DC setting lower it wouldn't race as much after start, but it might also not start as well... So might just be something you need to live with.
A while back I was trying to prevent a sagging of RPMs between shifts - I increased the idle DC.
#80
Well I've had a play with my settings and things have improved a little. Sadly I don't think we'll see temps as low as they were a few ago (-6degC and lower) so I'll never really know for sure about my cranking PWs at that temp range.
One thing that has really helped alot for me is reducing the cranking advance back to 12deg, set my ASE fixed map for 3 seconds at 84kpa and also make sure that my spark map at 84kpa is also set to 12deg at idle regions and raise the cranking RPM to 450. This means that during cranking my timing is always fixed at 12deg, even when the engine catches slightly and triggers ASE my fixed map value ensures that spark is still firing at 12deg and will do for 3 seconds after the engine has caught.
I've not heard any kicking back sounds yet and cranking for me at 12deg is loads faster too.
One thing that has really helped alot for me is reducing the cranking advance back to 12deg, set my ASE fixed map for 3 seconds at 84kpa and also make sure that my spark map at 84kpa is also set to 12deg at idle regions and raise the cranking RPM to 450. This means that during cranking my timing is always fixed at 12deg, even when the engine catches slightly and triggers ASE my fixed map value ensures that spark is still firing at 12deg and will do for 3 seconds after the engine has caught.
I've not heard any kicking back sounds yet and cranking for me at 12deg is loads faster too.