i bought a used s2000
and its got few mod in it
its got Mugen Header,ARC exhaust
but i duuno if the guy change the ECU or not or CAM

heres the problem,every time when i start the engine,the RPM seems like drop a lot and almost stall the car and goes back up again

what kinda problem could it be?and is that normal?thanks

 

try resetting the ECU but what rpm's is it dropping to? like whats the lowest it drops to and then when it fluctuate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nishant &raquo;</TD></TR><TR><TD CLASS="quote">try resetting the ECU but what rpm's is it dropping to? like whats the lowest it drops to and then when it fluctuate</TD></TR></TABLE>

hm...the rpm drops to like 200-300 i think
u can feel the car shaking like almost stalling

how do i reset the ecu?

 

that also happens to me once in a while.. can't figure it out...

 

happens to me too...once in awhile it just decides to do that...

 

so thats normal?or should i be worry?

 

i think it's normal if it happens once in a while.. i've noticed it seems to happen when the weather is very cold out.....

 

im not sure does it set a check engine lite?

 

my check engine light already comes on.becuz i have no cat

 

you can wack the map sensor a little see if it helps.....

 

mine happens when its warm weather...

 

so that's normal for s2000 right?

or should i reset my ECU?

and how do i reset the ECU?

 

pull the fuse or disconnect the battery for 15 secs, you will need you radio code though....

 

That's what happened to mine a month ago. It's in the shop and we're still trying to figure out the cause. So far we've checked the IAC, mostly all of the sensors, checked if there was a vacuum leak, etc. The only thing I can think about is probably a bad ecu or the TPS sensor. I'm through with fiddling around with it so I just sent it to a local honda dealer to see if they can figure out it. Hopefully they can because I can't stand not having my s2000 anymore.