hi,
I have a problem with my 1990 crx 1.6i dohc (edm). It runs pretty good, but when its warmed up...it has a really weird idle. I can't find the problem. So i connected the zeitronix to find out some more.

Connected TPS, AFR, RPM. The problem is....it goes up to about 1600 rpm, than it goes back to 1000-800 rpm. on and on....it shows 5% Tps, going to 7-8 and down to 2. on and on. what can be the problem ? Can't find it....anybody

If you want to see the full data from the zeitronix (so you can see al readings)..i can mail it to you..just need a little sofware..free on zeitronix.

 

alot of times those problems are from.....

-IACV being dirty
-TPS needing adjusted
-on the d-series there is a little tube bolted on under the TB, that once you take off the cover you can use a screw driver to tighten down the odd mechanism in the inside, sometimes fixing your idle....

hope it helps a little( in my opinion, it's probably your IACV or TPS)

 

thats called a FITV, theres a thread about it recently in this section started by me called surging idle, has some pics and stuff in it.

 

hmm you don't happen to mean the EACV
this little baby....cleaned it already

 

no thats the IACV.

I am talking about the FITV, and it doesnt need cleaned, it needs re-assembled.