im kinda new to this whole honda thing anyway i bought a 93 honda accord and it rev eral high when its started and then when is is in N or P after being ran for a while such as a highway trip it does it again i bought the book did the self diag stuff there were no errors but i cant find out anything and it only does it sometimes and ideas???:

 

If it only does it when its cold then its probably your Fast Idle Themo Valve.

 

ya there is a bultin about the fast idle thermo un screwing inside you could try removeing the 3 screws on top of it and screwing it back in with a flat head be gental.then undew your battery for a while and then hook it back up run engine till the collent fans run twice this will give your computer time to re learn ist idel.(the fast idle thermo is on the intake next to the drivers side two collent lines runing to it).i have also seen the iacs get stuck.

 

ok i look under the hood i think i found the FIT valve but im not sure can we pleez be more specific is it located on the front of the pgm-fi intake part on the driverside? the 3 10mm bolts horizontally holding it in place?

 

and what is iacs ?

 

Idle Air Control Valve

 

ok the fit valve is a tube looking thing on the intake manifold on the driver side it is facing the engine.on top of the fit ther is a round plate held on by 3 small screws take that plate of and turn in the big pug with a flat head screwdriver(its got greves that a flat head will fit in) if it has come un screwed be nice to it its made out of a soft plastick.if it is un screwed its leting in to much air.the fit changes you idle cold or hot when you engine is cold you want a higher idel so you engine stayes runing .so when the fit is cold it lets more air in to the engine to rase the idle when its hot it lets less air in to lower your idle.the iac(idle air control valve)is also on the intake it has one electrical conection and also has 2 collent hoses runing trew it it is controled by the ecm(engine control modual)to ajust the idle it has a small spining moter that contols a needle and seat set up to change how much air come into the engine.both are only used at idle ones you step on the gas pedle and open the tb(throtle body)thay are no longer used then the ecm moniters how much air the engine is puling and ads the right amount of fuel.


so spin in the fit puck and do the idle re lurn procuder listed on the last reply.if that dosent fix it i would try a new fit and a new iac.do the re lurn idle after that two.

hope this will help you.let me know

 

ok thanks i found it it was wat i thought it was and i tightened it down i got the batt un hooked right now then i will do the relearn proc and i will let everyone know

 

so far i think it worked i thank everyone here that help if u dont here from me again on this bored the prob is solve but well see again thanx

 

o also on the idle learn let it idle in park or nutral dont drive it ac,blower,and radio off.