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K24a3 - offset ignition timing offset at idle

Posted: Fri Aug 07, 2020 1:49 am
by Lyle_57IAL
Good Evening Hondata,

Currently i have a OEM standard K24a3 utilising a Kpro, with bosch 750cc injectors (deadtimes set), 50psi base fuel pressure, walboro 450 fuel pump. Have a strange issue at idle where the ignition tables are specifying 20 degrees... however the ignition timing delivered (through watching the Ignition timing data on the display) is around 1 degree.

Please see attached datalog and map. Multiplexer disabled, VTC table is Zeroed out, Set in open loop, knock sensor disable etc.

Any insight to this behavior would be much appreciated.

Lyle

Re: K24a3 - offset ignition timing offset at idle

Posted: Fri Aug 07, 2020 5:49 am
by Lyle_57IAL
Apologies guys here is the datalog

Re: K24a3 - offset ignition timing offset at idle

Posted: Fri Aug 07, 2020 9:15 am
by Spunkster
This ECU uses ignition to control idle so it will fluctuate a lot when it is idling.

Re: K24a3 - offset ignition timing offset at idle

Posted: Fri Aug 07, 2020 3:39 pm
by Lyle_57IAL
Yes but whats in the ignition table... does not match what ignition timing is being delivered.

Re: K24a3 - offset ignition timing offset at idle

Posted: Fri Aug 07, 2020 3:45 pm
by Spunkster
that is normal at idle.

Re: K24a3 - offset ignition timing offset at idle

Posted: Sat Aug 08, 2020 2:40 am
by Lyle_57IAL
Really ? Specifying 20 degrees and having -1 delivered ?

Re: K24a3 - offset ignition timing offset at idle

Posted: Sat Aug 08, 2020 7:22 am
by Hondata
Yes, it is normal. The ECU uses ignition to control the idle rpm.