Alright.. I did a few searches and talked to a few friends. My 6th gen i4 Accord w/ F-Max turbo kit is having problems idling normally at standstill. I ran a computer on the check engine light and a code came up for the IAC valve. Now I went to get get one because I was gonna take off the throttle body and replace it and Honda tells me you can only get it as a throttle body package. In other words I need to buy the entire throttle body unit, which includes the TPS and IAC valve and actual throttle body. I was told that you couldnt clean your existing IAC youre supposed to replace it. Any thoughts? Ideas on where to get an IAC Valve for a 99 Accord LX i4 5MT. TIA

 

Honda is wrong. The IAC Valve isn't even on the TB in 99.

it's #8 in this pic. http://www.hondaautomotiveparts.com

 

If it's built into the throttle body, why can't you take the TB off & clean it? People write about doing just that, here on the board. If that doesn't fix it, you're no worse off than you are right now...

How is the turbo controlled? Is the wastegate or BPC or whatever you've got causing the compressor speed to fluctuate? The error just means that the IAC is unable to hold a steady idle. It can't understand anything about fluctuations that are caused by changes in inlet pressure.

 

I had a F-Max kit on my accord and had the same problem with idle fluctuating. I couldnt get it to idle right even after replacing the iac. 2 weeks later I seized the engine. It really sucked but thats what happens with aftermarket turbo kits. I sold the car and bought a integra type r and I love it.

 

Try this.

https://honda-tech.com/zerothread?id=346498

It should be the exact same procedure.

I had to up my idle since the intercooler is a lot more restrictive than the stock air box when pulling air through the tiny bypass screw.

 

Did you ever find out exactly why the engine seized? What kind of fuel management and tuning did you have?