How do I adjust my idle?
 

I failed the smog inspection today because my idle was 1030 RPM (spec is 950 +/-50 RPM). The tech (I use that term loosely) told me to go see my mechanic and have them adjust the idle and the timing before I return to run the smog test again. :mad:

As I really don't have the time to take the car to the shop for this (and I think it idles just frickin' fine), can I drop the idle a bit myself without screwing things up?

Thanks in advance.

- Mike

If you only require to adjust the idle this can be done by adjusting the large screw at the left hand side of the throttle body under the i/c,,adjust this with the car running and you can see the revs dropping

Can I get to it without removing anything? Do you have a pic?

- Mike

Yes you can get at it without removing anything,just squeeze your hands in there and turn with medium to long sized plain screwdriver

http://forums.pelicanparts.com/uploa...1221836339.jpg

This is the adjusting screw.
You might be able to turn it with your fingers or a short screwdriver.
As you can see, this engine is not complete but you might be able to reach this screw with the intercooler in place.
Bill
http://forums.pelicanparts.com/uploa...1221836640.jpg

Thank you guys very much!

- Mike

The last time I had my engine out I attached a long extension rod to the screw itself, so that now I don't have to hunt around back there for that damn near inaccesible screw.

Yeh, I've still got a crick in my neck from trying to find it on most fully stock 930s even when you know where it is. Especially worse if you have a larger intercooler. The last one I had to move the car around at near sunset and wait,like a sundial, until the light shone in just right. For awhile I had flashbacks that someone had changed things but at the last moment I got a glimps of the screw. They were easily accesable before the intercooler. The 930 development was a work in progress so a few loose ends?? A few innovations like the before mentioned extension help finish the project, to be serviced by other that the 1970-80s Porsche trained and equiped techs ( who anyway are long gone from the Porsche dealerships located just around the corner ).

Thanks guys. I parked the car in my garage for two months (swamped with work)... and then finally adjusted the idle last night. I was able to do it with a very long screwdriver while the intercooler was in place.

I passed smog this morning. :D

To all who replied in this thread, you made my weekend! SmileWavy

- Mike

Excellent!! Glad we could help. Now that you've passed emmissions, get back in there and de-tune the thing so it runs right!!

Yeah, now I have to get it back to track-only status... aftermarket exhaust sans cat will be this weekend. SmileWavy

- Mike

This forum is great.

Trying to adjust my idle... a Google search brings me back to my original thread of a decade ago!

SmileWavy

- Mike

A decade ago you must have been a newbie. Considering the 4204 posts you've made, a person would think you would have intimate knowledge in things beyond a simple idle adjustment! Just jerking your chain... :-)
I still, to this day, swear like a sailor every time I fumble around back there trying to find that damn screw. I've long since lost my extension that was mentioned in post #7 (well, I didn't lose it per se, it kind of incinerated).

Ha! Last I adjusted it... I was 40! Now I am a mindless 50! ;)

Found the screw. Adjusted the idle. Stay tuned for my next request in 2028!

- Mike

Mike - if you get to 2028 without having to post on another issue, we will be calling on you. To see how you do it.
Alan