for some reason when I start driving the car when it's still cold the rpms will fall really low and almost stall and pick back up to about 1500rpms. Once the car warms up then it's okay.

However, I have another problem. When the car is warmed up and I step on it, my air/fuel gauge will read rich initially, but once it hits vtec it will slowly drop into the stoich area and eventually go all the way down to lean. If I don't let up on the throttle eventually the CEL will come on.

The weird thing is when the CEL comes on I feel any difference in performance and there is no weird sounds that I can find. Does anyone know what could be wrong?

I've ran a code and it say it's the oxygen sensor, but that can't be b/c my o2 sensor only has 3000km on it.

Please help.

 

did you tap your A/F ratio gauge into the o2 sensor?

 

no the air/fuel gauge is tapped into the ecu

 

The idle problem is most likely the IACV getting stuck open or closed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97hb &raquo;</TD></TR><TR><TD CLASS="quote">The idle problem is most likely the IACV getting stuck open or closed. </TD></TR></TABLE>

How would I go about fixing this?

 

ttt