i paid .95 cents for it. Also how to you check for air in the colant?

 

my idle goes up to about 1600-1700 and then back to 1000 its a constant thing. It only idle arlight when I first start the car but when it gets warm its starts to go crazy

 

check coolant line and everything was good. Still does it though anyone else know what it can be?

 

Jumping from 1000 to 1700 continuously? Your car's idle should be 700-800. Sounds like too much air is getting past the throttle body, through the IACV. Check for an idle adjustment screw on your throttle body. If you have one, turn it clockwise to stop the erratic idle. Cranking it all the way down should almost stall the vehicle due to not enough air. Then back it off until the idle is correct. Reset the ECU after doing this, but remember your Radio code and presets.

J

 

it could be you IACV is bad. put a new one on. cheapest way to get one is buy a TB off eGaymotors, usually for a Y7 it goes for about $7-12, then just swap on the new IACV and then sell the MAP sensor and TPS if you want. I've done it a bunch of times. If your car is a 98 then its about due cause mine went out about 2 years ago then put one from a 2000 on.

 

your ecu is constantly learning, a reset wouldnt be necessary. when you do adjust the idle screw turn it in 1/4 turn increments and wait about 10 seconds before adjusting again.

 

just got a new throttle body and I had an Extra IACV and I tried it with both and it still does it. Theres a hole in the throttle body that if I cover it with my finger it idles perfect. I dunno i might just bring it to honda and let them deal with it

 

that hole is supposed to be covered with a small rubber piece, get one from honda. idle adjustment screw cover.

 

also make sure you are using the blue IACV and not the purple one. the purple one is off a Y8 which boasts a higher idle and will make a Y7 idle like yours. the colors i am referring to is the color of the labels on the IACVs

 

problem was fixed today thanx for all your help