Is this from the motor?

[boosted1stgen]

Alright, i had my motor hanging from my engine hoist for a day or two. Today i seperated tranny and when bringin it up to attach to engine stand i found this underneath it, and ive never seen it before or recognize it. Any ideas?

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theres a rubber o ring at top of threads.

 

[Jazz]

BISS screw. Goes in top of the throttle body

 

[92awddsm]

Biss screw out of throttle body.

 

[BoostedinSoFla]

Looks like your BISS screw

 

[Rikolas]

How did your biss fall out?

 

[boosted1stgen]

Thats a very good question seeing as how mine still has rubber plug in it. I had replaced it like a year or two ago cause one day i had idle surge and my biss screw was missing, i wonder if its the one that came out. New one was also plastic i believe

 

[spyderdrifter]

New ones and old ones a like are nylon. It most likely backed itself out over time from excessive vibrations and a worn out o-ring failing to keep it sealed.

 

[boosted1stgen]

This one is made of metal