I have the stock GSR throttle body on my engine, and I was told that the throttle adjustment screw is broken, so we can't adjust the idle... I've searched the web and on here, but I can't find a good enough picture of the adjustment screw to compare mine to. Is it supposed to be to the left of the hose in this picture?

 

Yes, that is the adjustment screw. What makes that person think it is broken? From what i can see it looks normal.

 

There's no way to turn the screw.. There's no slot or cross for a philips tip...

He said to drill it out and get a new screw, but I was thinking of just using a dremel and a cutting wheel to cut a new slot in there and see what happens... Gotta get this turned down because idling at 2k is starting to be hard on my wallet with $3.25 a gallon for fuel...

 

Here's a closeup of the screw in question... I think I can see the remnants of an adjustment slot...

 

from the looks of the second pic, the slot if just gunked up with something. First try taking a flat head screwdriver and seeing if you can dig out whatever is in the slot.

 

I tried with my fingernail but will definitely try that..

 

Well, went out this morning with my handy-dandy 90* hook pick and started scraping away at that screw... Lo and behold, the friggin epoxy that was covering the screw started chipping off, and I scraped it out of the screw slot, and guess what? It turned and my idle went down...

Now why there was epoxy in there I have no idea...

 

GUD JORB!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C_EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">Well, went out this morning with my handy-dandy 90* hook pick and started scraping away at that screw... Lo and behold, the friggin epoxy that was covering the screw started chipping off, and I scraped it out of the screw slot, and guess what? It turned and my idle went down...

Now why there was epoxy in there I have no idea... </TD></TR></TABLE>

Just adjusting the screw is not recommended because the IACV is trying to keep the idel at 750 RPM. The proper way to adjust the idle requires the following:
1) warm the engine
2) shut off
3) disconnect the IACV
4) restart
5) use that screw to adjust the idle to 480+-50RPM
6) shut off
7) reconnect IACV
8) restart and check idele. It should be about 750 RPM.
9) recheck ignition timing

 

Problem with that procedure is that I don't think the high compression and Skunk2 stage 2 cams will idle at ~750rpm. It barely stays running at 1100...

 

That screw comes like that from the factory. It's to seal it up so you don't play with it, or so it doesn't move.

You'll need a 1000 rpm idle, minimum, for your set-up.

 

thats not a factory epoxy on the screw that's JB weld that someone else put on there to lock in their setting, thats why it chipped off, that's what JB weld does.