VH45DE After Start Enrichment event timed?
Posted: Sat May 22, 2021 9:11 pm
Hi All,
I have a VH45DE in a Z32, using an 8bit early ECU using the 66U15 base rom board from memory. Engine is relatively standard apart from valve springs and cams. Cams are 274 advertised / 222 at 50 thou. Everything is pretty well dialed in.
Have left the factory after-start table as it is up until now, and only adjusted the main fuel table, cranking and warm-up tables.
However...the After-Start table has never highlighted when active like all the other parameters, but after recently zeroing out is definitely scanned after the engine has cranked and started. I have now found my engine only needs maybe 65% of the after-start v's factory numbers and is a good improvement from what it was so keen to get there, or thereabouts without the guess-work.
My question is: How long does the ECU look-up the after start enrichment table before moving to the cold-start enrich tables? I am guessing around a minute from the engines behaviour but keen to know if there is a fixed time as the engine's quite lumpy at idle.
Cheers,
Lincoln.
I have a VH45DE in a Z32, using an 8bit early ECU using the 66U15 base rom board from memory. Engine is relatively standard apart from valve springs and cams. Cams are 274 advertised / 222 at 50 thou. Everything is pretty well dialed in.
Have left the factory after-start table as it is up until now, and only adjusted the main fuel table, cranking and warm-up tables.
However...the After-Start table has never highlighted when active like all the other parameters, but after recently zeroing out is definitely scanned after the engine has cranked and started. I have now found my engine only needs maybe 65% of the after-start v's factory numbers and is a good improvement from what it was so keen to get there, or thereabouts without the guess-work.
My question is: How long does the ECU look-up the after start enrichment table before moving to the cold-start enrich tables? I am guessing around a minute from the engines behaviour but keen to know if there is a fixed time as the engine's quite lumpy at idle.
Cheers,
Lincoln.