ok I've been having an idle problem, I have a 92 accord 2.2L SOHC manual Trans. and the idle will go from 1100 rpm to 1700 rpm back and forth and won't stop. I have replaced the PCV valve and the TPS sensor and the car still does the same thing. Can anyone help??

 

Vacuum leak is one possiblity.

 

Possible vacuum leak like what nwf_snake stated.

IACV, FITV, FIV - clean and/or adjust all of those and try adjusting the idle.

Flush your radiator and change coolant.

 

Ok I just cleaned the IACV (screen was dirty) and the FITV and the car is still doing the same thing. What is the FIV? thanks for the help

 

I also just figured out the code on my check engine light it reads 43 and the car is still surging. would a bad O2 sensor make my car surge?

 

Not sure if the 02 sensor will cause surging, but you will need to replace it regardless.
9 times out of 10 surging is caused by a leaking/bad Fast Idle Control Valve (or just low coolant/air in the cooling system), but it might be as simple as a vacuum leak...

sohc

 

when you open the top of the FITV [Fast Idle THERMAL Valve] there is a nylon "split" screw with a brass cone sticking up thru the center. Turn that split screw down a few turns.
Also be sure the coolant is full and the bock burped thru the 12mm bleed screw at the T-stat housing.

 

Did you ever solve this issue? I’m having the EXACT same problem with mine, and engine light is reading code 43 as well.

 

Did you ever get an answer on this - i have the same problem

 

This phenomenon is called "hunting"; and it's source is most often the IACV—kudos for focusing your efforts there. Despite the fact that you cleaned it, I believe the thing may still be the source of your problem. They do fail.

A new IACV is not a cheap; additionally, the Honda ECU sometimes doesn't play well with an aftermarket IACV. That said, I propose you purchase an aftermarket IACV from your local parts store who offers a full return policy, install it, and see if the hunting problem disappears (Note: The hunting phenomenon may be replaced by a brief surge to high-idle before idle backs down and normalizes).

If you find success with a new aftermarket IACV, you can deliberate keeping it in your car, or returning it and purchasing either a new or used genuine Honda IACV for the peace of mind it provides.

 

"engine light is reading code 43"..?

Hook up a DTC read and post the actual P-code, if any, that is stored.