accord9t3

I have been trying to figure out a idle surge problem from the many posts on this forum concerning the topic.

I have cleaned the screen in the iacv. no help

I cleaned the fitv. no help

I tested the iacv off the battery. It clicked so I assume it works?

I tested the voltage of the tps. It was .56 closed. I understand it should be .5v. Do not know if .56 is fine?

I tested the tps fully open. It was 4.7. I read it should be 4.8. Do not know if 4.7 is fine?

PCV appears fine

Cant find any vacume leaks

The car idles from 1500 to 2500 when first started. Does not matter if its cold or hot.

Any idea what the problem is?

momstaxi

idle adjustment screw on throttle body?

accord9t3

I turned the idle screw and it didnt really seem to make any difference. Not being a mechanic I do not know what that means but would think it should have some affect when I turned it?

Phelixthecat

did you short out your ecu while you were doing it?

accord9t3

car runs the same after everything i did as b4 i started messing with it.

dont know if this is anything but i read to take out the "backup" fuse to reset it or something like that. when i took the fuse out it was blown. will check to see if it is blown again.

b8er

if its a fuel injected motor this is what to do: under the hood theres gonna be a little oval type shaped cap with two screws on it just to the right of the throttle body, take off the 2 screws and the cap or lid or whatever you wanna call it and inside should be a little black plastic thing, all you have to do it turn the platic thing down into the hole more till it bottoms out then put the cap back on and fire it up, should fix your problem, if your not sure what im speaking off email me at b8er@hotmail.com or add me to msn , i can get pictures if you like

accord9t3

what is the little thing under the cap? i am going to go out there after the car gets back from the store and see if i can find it. will let you know what happens.

Mike813

try letting letting the air out your radiator or change the fluid...

i have a similar problem with my 5th gen, it starts at almost 2k then moves up & down a bit at times... i never figured out the problem either but i just got use to it... im guessing thats whats killing my gas mileage...

accord9t3

have read air in cooling system can maybe cause this problem. will check into it and see if thats it. i am getting frustrated with it. but hate going to shop. to much money. seems like the cel would be on or something......

hondaracer.com

I've got a project 95 with the same problem. i've checked vacuum hoses/gaskets, the diaphram, idle screw, burped the coolant numerous times and even flushed it. throwing no codes. but i noticed on mine that it doesnt start the erratic idle until it gets warm.. once the engine lowers its idle RPM because the engine is warm is when it starts the rev'ing

Mike813

you guys try volt metering all the sensors? thats the only thing i didnt do yet... but i guess its a pretty known problem for accords.. i got over 130k on the vehicle...

Hondaman56

I had this problem for years. Its a bad thermostat. Replace the thermostat and gasket. Mine was stuck open. The car was actually cold but because warming water was flowing through the system instead of being held until the motor reached full operating temp, it drove the sensors wild.

yellow4dr

bro check your fast idel thermo valve under your tb its 3 bolts take it off and look at it, its loose happend to me