94 celica ST idle flucation, cant get the idle to be steady. Options

[rapid36]

Hi everyone my 94 celica ST has a idle fluctuation when im in gear and have the fans on. when the fans go off i idle at about 1k. normal idle in park with no fans or accessories on is about 1.5k which I know is a issue, I replaced the fuel filter, spark plugs and spark plug wires, o2 sensor, throttle body and TPS from another celica but I dont think I aligned the TPS correctly? Do you think this may the cause? If so does anyone know how to properly re adjust the TPS sensor onto the throttle body?

https://youtu.be/mmk4e4pkoo8

Im also getting a code 25 which says "The air/fuel ratio feedback compensation vlave or additive control valve continues at the upper (lean) or lower (rich) limit for a certain period of time." And noticing this I had another set of fuel injectors that was off my old celica which ran just fine and put those on so I dont think its the injectors. Any help is appreciated.

This post has been edited by rapid36: May 17, 2016 - 11:43 AM

[Box]

I'd check around the intake manifold, throttle body, and injectors as those can sometimes start leaking. Another thought is there's an A/C idle up circuit that has a solenoid that induces vacuum to raise the idle, so if it's stuck open and your A/C is off that could cause a higher than normal idle.

[rapid36]

I'd check around the intake manifold, throttle body, and injectors as those can sometimes start leaking. Another thought is there's an A/C idle up circuit that has a solenoid that induces vacuum to raise the idle, so if it's stuck open and your A/C is off that could cause a higher than normal idle.

Thanks! Messed with the throttle position sensor a little and found it not to be an issue, so maybe there is a vacuum leak somewhere, ima try and look for one today after work. I'll keep everyone updated on what I find.

And just out of curiosity will a vacumm leak and a lean condition make the car loose power? cause this car doesnt have much power compared to the other celica ST I drove. I know these cars arent fast but I know mine itsnt up to par of a stock one lol.

This post has been edited by rapid36: May 19, 2016 - 10:55 AM