93DX

Hi, I have a 93 civic DX and for some reason just recently it wants to when I first start the car it will rev hi for a little and then it warms up a little will idle up and down. Some times it goes away. But it still will not go down to like 1k or even 900 idle like it always did before. And some times it will go away if i turn on the ac or heater along with the rear defroster or lights. Now it seems, like its getting worse, like it will not stop going up and down if i turn other stuff on. Any help will be welcome.
Sorry before for the misgrammer

MerF

That truly hurt my head to read.

Try again with punctuation.

kawgomoo

does the idle stabilize after the car warms up completely?

93DX

it did before but recently some time it wil do it a little

93DX

i have cleaned out the throtal body plate and were it seals. It was nasty as crap
but it is still doing the same thing

kawgomoo

[QUOTE=93DX]i have cleaned out the throtal body plate and were it seals. It was nasty as crap
but it is still doing the same thing[/QUOTE

well more than likely you need to adjust what we call the thermo wax valve. its the little thing on the bottom of the throttle body, it has 2 coolant lines on it, one comes from water neck or head, then goes out to the iacv on the back the intake manifold which has one more line going out of it back to the motor somewhere.

so yeah, this valve has no wires going to it. there is a plate on the end most likely facing the firewall. {2} 8mm/phillips head screws hold the plate down. loosen one screw remove the other, swing the plate down and tighten t he white thing in the middle. use a big ass flat head to twist it down, it doesnt have to be tight at all just very barely bottomed out. reinstall the cover plate and ur done.

also the iacv and thermowax valve need to be installed and the coolant lines plumbed correctly. often people with intakes fuck up the routing of these hoses.

last but not least pull the idle air screw out hte throttle body, clean it and t he hole it goes into with carb cleaner. reinstall and adjust. and by george change the fuckin pcv valve and hose!

93DX

ok ill check those and see what happens and yes i will change the pcv and the hose

kawgomoo

changing the pcv wont really help anything, but im sure alot of gunk in the t/b is by product of all sorts of nasty crap being yuked out the pcv.

if you cant get to the thermowax thing three 10mm {wrench size} bolts hold it on. you can remove those, or just take the tb off and flip it sideways.

black6gen

check your map sensor

Iceman05

thermo wax valve or FIT (they do the same job, but i dont think d-series have FITs)