Just wonder if the extra air valve on the right side air box is really need. reason for asking is I was detailing (wiping down by hand) the engine compartment getting ready for a car show and noticed it was hot! so I disconnected it and the car ran fine and idled fine.

 

As I recall...a little foggy on the details here....on the earlier cars likes your '84 the EAV (or Supplementary Air Valve in some literature was tied into the 45-second timer for some sort of emission control function. Later cars (maybe '87-later?) the EAV was also tied into the a/c compressor circuit to increase idle speed with the compressor engaged.

So there might not be any reason for you to feel any change in idle speed.

Cheers
DD

 

Doug is spot on.

I removed all mine, and no ill effects at all.

Simply plugged the hole with a generic rubber grommet.

 

I replaced mine with a Toyota adjustable one like Kirby showed in one of his Jag-Lovers posts a few years ago. I set it to increases the idle about two hundred rpm when the AC compressor comes on.
BTW, My compressor don't come on unless the AC is turned on

 

doesn't the sav draw the air through the dizzy to stop fuel fumes from blowing the top off its cap

 

No. That is via a little filter, located on the left side of the engine bay (B bank), through hoses, through the dizzy, through a hose to the hose between air filter box and EAV (the wax unit one on the rear end of the B bank). So in theory, it only actually works when the EAV is open (cold).

 

l don't believe that to be the case Daim. The dizzy vent hose connects on backplate side of EAV/AAV so would still be subject to air cleaner depression regardless of EAV/AAV status.

 

The vacuum lines for the dizzy works off the AAV on the B bank side which is located on the rear, The EAV is in the A bank side toward the front on the air box/air cleaner box and has nothing to do with the dizzy

 

There is a "draft" in that AAV elbow at ALL times.

More when cold, for obvious reasons, but the idle speed adjuster limits that draft via the "bleed channel" cast into the AAV housing, when the cold start aperture is closed by the piston.

 

EAV is the term given for what some call the "extra air valve" which is in fact the auxiliary air valve or AAV hence my EAV/AAV.
The valve on A bank is the supplimentary air valve.

 

The Aussie English is so special, we know exactly what WE are talking about, the rest are in the Dark, and catch up eventually, mostly.

Well explained.

 

Your right, I am am wrong, all these, this valve, that valve, you valve my valve, confused yet LOL

 

All good Daverb. l wasn't trying to be smart a*** or win a contest. Just that misnomers can take on a life of their own if allowed to and that definately leads to confusion.

 

What we call the AAV is listed as "extra air valve" in the parts catalogs.

The valve in the RH air cleaner is called "supplementary air valve"...as someone mentioned above....in the parts catalogs.

A week's pay says that [at least some of] the confusion in terminology comes from service manuals-vs-parts catalogs, as discrepancies in nomenclature pop up from time-to-time.

I can't swear to it but I think the late 70s vintage service manuals called the B-bank valve "Auxiliary Air Valve" ....and the term just sorta stuck with us.

Cheers
DD

 

I know you weren't being a smart a%%, but thank you for reminding me what is called what