Anyone know I've tried 5mm 5.5mm and the standard sizes that around that and nothing will grab and turn that screw.

 

it's because the "Hex" wrench that it uses is pentagonal. That's right. 5-sided:


Get a 10mm bolt and a grinder and grind it to fit.
Isn't Honda fun?

Pirate

 

I'm sure this is a retarded question but what does that do? I've seen it but I could never find a key that would fit lol.

 

I'm assuming it allows me to adjust the IACV much like the screw on your throttlebody adjusts your idle rpms.

While I was trying to set my idle speed in hondata, when I plug in my IACV and clear the code it doesn't idle at 850 it's at like 775-800ish so I'm figuring this needs to be adjusted a bit.

Is there a tool or anything that will work on that besides grinding a bolt? If not I think I can get my hands on a grinder to make it so thats not a problem

 

Manual spec says to set the idle as follows:
Connect ecu jumper.
Use idle screw to obtain desired idle.
Now set the hondata to that idle speed, the stock ecu is already set at 750 +/- 50 rpm
Disconnect ecu jumper

When you jump that it kills ignition advance as well as the IACV so you can set a true base idle (and timing).

If you can't get it to idle where you want it, try cleaing the TB well and putting some new sealant behind the idle screw. Other than that check for vac leaks(if it's too high).

You shouldn't need to adjust the IACV at all, that may be why honda used that funky bolt head.

 

^

I'll try that out and get back thanks mgags7