I have a 90 honda civic hatch, and for 2 days now its been idling really wierd, it goes up and down and i don't know whats wrong with it, its brother the hell out of me and i wish some one could tell me, whats wrong with it.. please if anyone knows whats wrong with it, please help me....

 

IACV (air idole control valve) most likely....if not TPS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">IACV (air idole control valve) most likely....if not TPS.</TD></TR></TABLE>

and wrong forum

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lauj87 &raquo;</TD></TR><TR><TD CLASS="quote">IACV (air idole control valve) most likely....if not TPS.</TD></TR></TABLE>

It's Idle Air Control Valve, as the acronym would spell IACV.

But anyway, your IACV is most likely clogged. Search around on here for DIY's on cleaning it out.

 

ahhaa yeah i realized it when i posted it already haah but you guys know what im talking about :-D

 

well i replaced that iavc and its still the same, i have no leaks on the manifold but its still the same, and i'm not really sure if its my wiring, becasue my ECU is reading only one and well, i know thats the oxygen sensor, but its still the same.....

 

then its your TPS...(throttle position sensor)

 

hum, my engien is D15B2 and its dual port, i dont know if thats going to help, i replaced the EVAC instead of the IAVC, hum also the TPS sensor is ribbed on so, how do i go about cleaning out the IAVC?

 

humm.....i never changed one on a D series motor..but with my b series it just bolted right off!