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Nissan 300zx Z32 "raise idle at startup" duartion?!
Posted: Fri Oct 29, 2010 10:57 am
by eduardo
I got a small problem with my 1990 Z32 ecu, Every tune or every ecu gives me same results. When engine is cold, start-ups are nice and smooth, engine does not die. But when engine is warm the idle raises then falls and engine stalls, I start it again and idle is fine.
I wonder if there is a address in the hex code where it makes ecu raise idle at start up and when warm? I would like to increase the duration of that if posible, let me know. I can code it directly into bin file!
Re: Nissan 300zx Z32 "raise idle at startup" duartion?!
Posted: Fri Oct 29, 2010 5:05 pm
by Eric
idle rpms can be adjusted in the table at IDLE CONTROL >> IDLE RPM
But before you change anything make sure base idle is set correctly and the idle problem is not cause by anything else.
99% of all Z's should idle fine on the stock idle RPM tables..even highly modified ones.
http://300zx-twinturbo.com/cgi-bin/manu ... &total=190
http://300zx-twinturbo.com/cgi-bin/manu ... &total=190
http://300zx-twinturbo.com/cgi-bin/manu ... &total=190
http://300zx-twinturbo.com/cgi-bin/manu ... &total=190
Re: Nissan 300zx Z32 "raise idle at startup" duartion?!
Posted: Sat Oct 30, 2010 7:15 am
by eduardo
[quote="Eric"]idle rpms can be adjusted in the table at IDLE CONTROL >> IDLE RPM
But before you change anything make sure base idle is set correctly and the idle problem is not cause by anything else.
99% of all Z's should idle fine on the stock idle RPM tables..even highly modified ones.
I am not asking about "idle speed" you did not understand my question. My engine idles fine. I don't have a problem with base idle. I know that there is a value and a table that only is considered by the ecu for the first 5 seconds of the engine start, thats the table that I need. I started having this problem when I removed and eliminated EGR and other emission stuff. Please Eric do not smart me off I know Dutch people are superior to other peoples but I realy know Z32 very well and I am mechanic for 15 years.
Hex 7EB0 1x16 map, I am experimenting with it now, if someone knows more please share
Re: Nissan 300zx Z32 "raise idle at startup" duartion?!
Posted: Sat Oct 30, 2010 5:32 pm
by Matt
You are using 16 bit Z32 ECU (Type 3) right?
One of these 3 tables get used after startup for small period of time. I need to sort this one on the bench and track which one transitions for periodically after cranking:
After start enrich
Cold enrich
Warm enrich
Try adjusting these and see how you go. I'm doing table highlighting work at the moment so will light each one soon with it as the ecu uses it