ok my 97 ek hatch 1.6

once the car warms up the idle goes up and down up and down if i tap the gas it stops sometimes. the only code i have is primary o2 but the car runs great other than the idle issue. if i unplug the map it stops if i unplug the tps it stops but idles up ive checked for vacume leaks and i found none. any help would be great

 

IACV?... maybe you need to clean/replace it...

 

i did clean it is was pretty dirty but it cleaned up nicely

 

not to mention it isnt giving me any codes is that possible?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tallyturbo &raquo;</TD></TR><TR><TD CLASS="quote">not to mention it isnt giving me any codes is that possible?</TD></TR></TABLE>

maybe.. the only car we had this happen to is an 87 civic si...

TB gasket, IACV, FITV, fuel management... thats some of the **** I would check. if worst comes to worst... bust out the tools and start an air intake rebuild

this is confusing me...

 

You probably have a vacuum leak somewhere. Unplug the IACV, this should make the leak much more audible. If your idle is over 450rpm without the IACV, you more than likely have a leak. Gradually pinch off the PCV hose with a pliers and towel to decrease the idle further, until you have isolated the leak.

 

https://honda-tech.com/zerothread?id=1979500

good info