Bolt on FI Plenum

[budzinsk]

Hi Everyone. I was finally able to get my 84 Spider running this weekend thanks to some kind members of this forum. The engine runs well, but I heard a loud vacuum leak. It turns out I am missing a bolt on the intake plenum. I found a pic that someone else's intake plenum - see the bolt below. 3 Questions: 1. Are there any sources for this bolt , I could not find a source anywhere, new or used. 2. Does someone have a picture of this bolt on its own outside of the plenum? I can try and get a match with some of my spares. 3. What does this port do?



Thanks
Rob

[So Cal Mark]

that is an air bypass screw that is used to set idle speed. It is a special bolt with an o-ring to seal it.

[KevAndAndi]

In the past, I've seen this item offered by vendors, but I don't see it at this time. I'm sure someone here has an extra. It's kind of important.

[budzinsk]

Thanks Guys... I went through the pictures I had when I got the car and started the restoration, and it looks like there was a rubber plug in there (which I still have). At least I am glad I did not lose that special bolt - it looks like I never had it..... If anyone has one, please let me know.
Thanks,
Rob

[budzinsk]

Midwest has this plug, but this is for the AFM and not the throttle housing. It will not work, correct?

http://midwest-bayless.com/p-11140-5924 ... e-nos.aspx

[joelittel]

The plug pictured above will not work.

[joelittel]

http://www.spiderroadster.com/index.htm

I've had good luck with this vendor. Send them a picture of the hole your missing idle adjustment screw should be in. That way you can be sure the two of you are talking about the same item.

Bradley Artique has a free and downloadable pdf called FIAT 124 Engine Maintenance and Modification. There my be a picture of this screw in his pdf.

something like this...
http://www.ebay.com/itm/311742278547

There's a chance that I have one, but I won't be able to check until Saturday. PM me if you need me to look.

[ORFORD2004]

I think I still have the complete throttle body.

[budzinsk]

Thanks for your help guys, I really appreciate it. I will reach out to that vendor and see if they happen to have one. I will report back either way. Thanks
Rob

[budzinsk]

Thanks Everyone. Jay at Spiderroadster had one for me. It will ship out today. Thanks for the tip!

[KevAndAndi]

Thanks Everyone. Jay at Spiderroadster had one for me. It will ship out today. Thanks for the tip!

Does it come with the o-ring?

[budzinsk]

Yeah it did, but I will likely replace it with a new one.