Seriously --- there are SO MANY things in tuning an EFI set up - that there's no way to teach you what to do via a forum like this... as much as many of us would probably like to be able to... it's just impossible.
Cold and Hot start have several parameters to deal with - based on ECT (engine coolant temp). You are either pulling out some fuel or adding some fuel... usually pulling out (leaning out) the cranking fuel when hot -- and adding (richening or fattening) fuel when cold....
I would let the car sit overnight - then without starting - turn the key on and open your laptop to the screen that shows you the cold start enrichment... I can't tell you what that screen is actually - they all label these screens with different names and I use Accel Gen 7... but somewhere in there is a screen that will show you ECT and FUELING.... again without knowing your particular program I can't tell you if you're bumping via a percentage or what - but I'd try adding some fuel if it is a little cold starting... maybe bump it up 10 or 15%.... don't do much -- see if it will start - if it starts faster -- GOOD you're on the right track - if it doesn't start - then try pulling some fuel OUT -- and see if that gets any better.... I would only do this for the TEMP that you are in at that very moment (ECT scale will show you exactly where you're at - only adjust it right there - don't mess with the entire scale - at this point you're just fishing!)
For the Hot start --- do the same thing -- get motor warm -- hook up the trusty laptop and see the warm start fueling screen (most likely the same screen as cold -- just on the upper scale TEMPERATURE WISE) -- try pulling some fuel out - see if it starts better - if not ADD some fuel...
Once you kind of see where you're add with this - then you might try smoothing the fuel curve out -- so that you're affecting a little wider area on the ECT scale of things....
Hope this helps....
SO here's the deal -- it could also be a timing issue..... you may need to adjust timing either up or down just for COLD START and or HOT START... but I'd mess with the fueling first to see if that helps before I'd mess with the timing. One thing you'll learn with EFI tuning -- only adjust and work on one area at a time -- otherwise --- you won't really know what adjustment you did that made the difference... if you mess with fuel and timing --- which was it that changed? Get my drift?
Lean for a day - Rich for life!
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