Re Emissions light - intermittent
Hi,
I assume by 'emissions light' you mean the yellow malfunction lamp indicator (next to the low oil pressure indicator on the left hand side of the instrument panel).
The same thing happened to my car (3.2 manual), it would come on when cold and then if you left it running for a few minutes and restarted it would go off.
Turned out to be a faulty o2 sensor. Honda (Gloucester) were able to diagnose the fault immediately (sorry, can't remember the fault code!), although the part took quite a while to arrive.
Not sure on the exact cost to fix (mine was covered by warranty) but when speaking to the the nsx mechanic that worked on it a few months later he said that it was probably in the region of £200 - £300 if this helps.
Out of interest do you find that the engine is holding onto its revs more than usual? - this happened to my car whilst it had the fault.
1997 3.2 in Imola Orange Pearl