kush only

hi guys, let me give u specs of my car, its a 02 with 40k miles. it seems like everytime i start my car in the morning and push the start button, it sounds like its about to die then comes to life. is there something i need to replace?

SIIK2NR

I have a MY04 and mine does EXACTLY the same thing probably 1 out of every 3-4 startups.

xviper

Don't "help" it when it flounders. Keep your foot off the gas and let the ECU contend with what's going on. Hopefully, it will learn after a few episodes. If you "help" it, it will take that much longer to learn.
If, after a few goes, it doesn't learn, you might look into doing the MAP whack, ECU reset or even getting a new MAP sensor. This is no guarantee that the problem will be solved but it's a good start.

SIIK2NR

How long before I should consider taking it to the dealer?

I've never seen a list for TSB's for the >04 models, is there one floating around I haven't seen?

xviper

Give it 4 or 5 "near death" cold starts and make a decision at that time. The TSB for the revised MAP thing is a system to hold it in place. I don't believe there is a model year to which it applies. Honda has placed a certain criteria on getting this done. It involves hesitation at high rpm. These "near death" cold start scenarios do not fall under such a category, but it is possible that it is related. If Honda won't give you the TSB, it might be worth a try to do the MAP whack, ECU reset. If this resolves the issue, this might give you enough indication for you to do your own securing mod to the MAP harness.
Here is the thread that talks about it:
https://www.s2ki.com/forums/index.php?showtopic=253242

This whole cold start thing goes back to the very first year that S2000s existed. It is the ECU unable to contend with a change in climate and environment at certain times of the year - seasonal changes, humidity, air pressure, ambient temps, etc.

kush only

yea, i never gas it while starting the car up. it just hesitates like its going to die, then gently starts up, which causes me to hold the start button a bit longer. btw, this only happens at the initial startup. could it be my single exhaust? it happened a while after i installed it though, also when the weather started to get a bit colder.

SIIK2NR

Thanks Xviper........

AP1, I have the issue with hesitation and I have the stock dual ovals so I wouldn't think it's your single can.

SIIK2NR

Update!!!!

After further review of my owners manual on the quick start quide it says the following under "Things you need to know":

"At times the engine may take longer to start than usual; the engine management software is working to reduce emissions at start up."