1981 FI crankcase breather "flame guard"?

[dantye]

I just replaced both of these hoses and now I discover there may be a gadget called a "Cyclonic flame guard" that should be in one end of one of these hoses. I encountered no such gadget during the replacement.

1. Is this needed? and if so,
2. In which end of which hose is it installed.

Thanks

[fiatfactory]

.

[dantye]

OK, but I keep reading in goes in the "air cleaner" end of the hose - on the FI models, I expect it goes on the Throttle Plate end of the hose, since that is clean incoming combustion air; but the location is a couple of feet from the "air cleaner." Can someone confirm this, please.

At any rate, I will be getting one, since I am beginning to think that the DPO, after removing it, got a backfire so powerful that it bent the air flap in the old AFM. It was always sticky, but I had just one backfire while getting it tuned up; it got even worse and I had to replace the AFM. I was lucky to find a good used one. Don't want to do that again!

Thanks!

[So Cal Mark]

the flame trap won't have any effect on a backfire and afm, it's only purpose is to keep the crankcase fumes from exploding