what is this? and does it have anything to do with my intake sitting WIDE open when its off? And why does my idle go up (if i remember right) when I unplug it?

 

Looks like the vacuum line for the dash pot.

 

huh?

 

Your engine RPM goes up when you unplug it because you are feeding more air into the motor.

And yes it is a vac pick up line, probably for the dash pot.

And you do know that in this picture your intake is not wide open...


It is the 2nd set of throttle plates, which help for lift throttle run on and to help you keep from romping on the motor while it is too cold.

 

well i know its not open, but whats the deal with the stuff up in front sitting open? and I still dont completley understand... it may be i just got to work and im kinda tired...

 

wait nevermind... i just had it explained to me lol

 

That hose with the green thing is what was giving me trouble about a week ago.

 

The Double Throttle Diaphram shown in my jpg is what determines if the outer set of secondary plates are full open or not when the engine is idling.

When the engine is off, there is no vacuum to it thru the green/black delay valve, so the diaphram can't pull the plates shut. IT is spring loaded to the full open positon if there is no vacuum OR if the diaphram is busted inside the Double Throttle Diaphram.

The Double Throttle Diaphram only shuts the outer set of plates if the engine water is cold. The delay valve, gree/black, goes back to the water thermo valve. That valve feeds vacuum when the water is cold, shuts the vacuum off when the water is hot.

I don't own a series five and am not sure what hose that red arrow is pointing to. Fuel injector air bleed is what I'd guess.

 

hmm what could happen if you remove the black/green relay and replace it with a normal v. hose

 

I'm pretty sure that's a check valve. Don't remove it. If yours is broken, Dale Clark sells 'em on eBay for cheap.

 

It's supposed to be a Delay Valve, the Green/Black ones. It's not a check valve.

The White/Green ones are check valves.

Using a checkvalve would leave vacuum on the diaphram side of the valve, even after the vacuum was closed off on the other side of the valve. The Delay valve will bleed off the vacuum slowly after the source of vacuum is cut off by the water thermo valve.

I wonder if this car is an automatic?

 

hmm naw there was nothing on the hose i replaced it with it's just a normal hose and if you was talking about mine it's a 5 speed

 

Just talking throttle plates, not the hose.

 

If the Double Diaphragm was defective what would the net result be if the vacuum hose was disconnected from the diaphragm.

 

If it does not get vacuum or the diaphram is busted,(or the vacuum hose is off the diaphram, it gets spring loaded to full open. A positon it would be at after a few miles of driving anyway. Personally I'm never see a double throttle diaphram that wasn't busted. Anyway, it'll not like large amounts of throttle til the engine gets up to running temp. Only takes a few miles to get fully up to temps. Minor driveability problem.

Talking non turbo engines.