924Board.org

Sensei Grant · Joined: 17 Apr 2016 Posts: 11 Location: Tuscaloosa, AL

First, Hello to everyone. I have spent a little time looking at the FAQ and other posts and I would like to say thanks to all the helpful people making this a great resource. My 2008 Smart ForTwo was totaled in an accident at the end of February and my "new" car is a 1977 NA 924 (I was told it is a 1977.5 if that makes any difference). I am looking forward to the time I will spend working on my car as I will have to keep it going since it is my daily driver. So to the Help portion, I have a sticky throttle which I thought was the cable but on closer inspection the problem is at the throttle body. Specifically the throttle stop screw is missing. As a result the throttle closes too much and sticks. I have had no luck with the search function so I am asking. Does anyone know the technical specs on the throttle stop screw? I am working form the assumption that it will be a metric thread and I can just buy an assortment in sizes that look close and try them until I get one that works; however knowing the correct size would make it a lot easier as I will not only need the screw but also a nut to lock it into place.
_________________
Always be yourself, unless you can be Cthulhu, then always be Cthulhu.

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

The throttle stop is actually a stud with a flat head slot in it, along with a jamb nut. I don't know the thread off hand, but it is tiny, possibly as small as M4 or M5. You might consider getting an allen-keyed stud, as in the following photo, as I've had the slotted part of the stud break on a couple of mine.

_________________
erstwhile owner of just about every 924 variant ever made

Sensei Grant · Joined: 17 Apr 2016 Posts: 11 Location: Tuscaloosa, AL

Thanks for the info.

It is in fact an M5 and while I could not locally source a stud or set screw that was long enough, I was able to fix the problem. In my case, the space between the throttle and the throttle body was just the thickness of the M5 screw head so I held the throttle open and screwed it all the way in and then back out 1/2 turn per the throttle stop set procedure and locked it in place with a nut. Now the throttle stops against the head of the screw. So far it seems to be working well and my throttle is no longer sticking which makes driving much nicer.
_________________
Always be yourself, unless you can be Cthulhu, then always be Cthulhu.