i've had a bouncing idle for awhile now, and i can't seem to find out whats wrong with it, i've replaced both the fast idle valve,IACV, i've sprayed every single vacume line i could see with WD-40, and still same thing, i sprayed both the top of the intake manifold gasket, and the throttle body gasket and still nothing? what could it be??? i'm ready to pay and arm and a leg and just let the honda dealership take care of it?

I have a 94 Civic LX (D15B7)

 

BUMP

 

BEFORE-WORK BUMP

 

map sensor maybe??? can't hurt to check.

 

Try bleeding the cooling system of possible air bubbles.

 

Definately check your cooling system completely, I had that problem not too long ago and I didn't fully check my system and the end result was me shelling out 1200 for a shop to fix my block because the cooling system failed and warped the head.

Oh, and stay away from any of those "liquid miracles in a bottle", they didnt work when I tried. However it was extremely cold when I attempted it (35 degrees) but I still would not waste my money on that again.

Hope that helps.

 

Did you replace the IACV and FITV with ones that you are sure worked?

Any CEL?

Can you give us a little more info on when the idle is erratic?

Definitely bleed your coolant to see if theres air bubbles.

 

oh and screw in the white plastic piece inside the FITV. that is sometimes the cause for hunting idles.

 

there are no CEL's

my cooling system is bleeded, and yes i know they work becuase i changed to a Z6 manifold, and they worked before on my B7 manifold

i know its got to be a vacume leak someplace i just can't seem to find it

 

bump

 

bump bump bump