jwizzie2001

some body told me that my surging problem could be caused by the fitv . how do u inspect it and fix it

instructor74

the fitv is the fast idle thermo valve. Here is a quick way to check it once the engine is warmed up remove the air intake at the throtle body (TB). Look inside the TB there will be 2 holes with the engine running stick your finger over the bottom hole if you feel vacuum then the fitv is not closing and need removed and repaired or replaced.

jwizzie2001

what do i replace n were is it located ?

JDM_EK_wanabe

https://honda-tech.com/zerothread?id=1564019

instructor74

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_EK_wanabe &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1564019</TD></TR></TABLE>
This is a grate link if you need to service it. It could also be caused by the iacv (idle air control valve). It just depends on when you are having your problem. If it is all the time then look at the iacv if it only happens after warm up then its more then likely your fitv

jwizzie2001

i adjusted it all the way andit still surgeing after it warms up doi have to adjust it back to were it was or close to were it was ?

jwizzie2001

i adjusted it all the way in and it still surging do i have to adjust it back to were itwas or almost were it was ?

B18C5-EH2

The fast idle valve (or fast idle thermo valve) might be broken inside, and if that's the case no amount of adjustment will fix it.

Also if the electronic idle air control valve (IACV) is bad it will throw a check engine light 90% of the time.

What year/make/model is this car?

jwizzie2001

its a 93 civic hb with a stock d15b7 . I took the fitv valve apart like u described in the pics i didnt see any thing rong with it but then again i dont know and i also replaced the iac . it surges when it warms up not when its cold .