Vacuum Part I.D.?

[Griswald]

This is for an 89 5.0 SSP bone stock.
In my on going quest to cure my code 41 & 91 issue, I was doing some vacuum testing with a gauge. I got about 20 at the brake booster. I also got good readings on the EGR valve, TAD & TAB solenoids, but when I pulled the line that runs from the intake to the charcoal canister I got nothing.
What is this?

View attachment 202235

I can't blow air through it. I'm assuming it's triggered to open electrically? Does this part go bad?

I think I'm using the right nomenclature. I've only had this car a few weeks, and although these codes are annoying, it's made me read multiple threads and now I know a ton more about it. Any help would be greatly appreciated!
Thanks,
Chris

 

[bp50]

That's the canister purge solenoid.

 

[jrichker]

Charcoal canister plumbing - one 3/8" tube from the bottom of the upper manifold to the rubber hose. Rubber hose connects to one side of the canister solenoid valve. Other side of the solenoid valve connects to one side of the canister. The other side of the canister connects to a rubber hose that connects to a line that goes all the way back to the gas tank. There is an electrical connector coming from the passenger side injector harness near #1 injector that plugs into the canister solenoid valve. It's purpose is to vent the gas tank. The solenoid valve opens at cruse to provide some extra fuel. The canister is normally mounted on the passenger side frame rail near the smog pump pulley.

It does not weigh but a pound or so and helps richen up the cruse mixture. It draws no HP & keeps the car from smelling like gasoline in a closed garage. So with all these good things and no bad ones, why not hook it up & use it?


The purge valve solenoid connector is a dangling wire that is near the ECT sensor and oil filler on the passenger side rocker cover. The actual solenoid valve is down next to the carbon canister. There is about 12"-16" of wire that runs parallel to the canister vent hose that comes off the bottom side of the upper intake manifold. That hose connects one port of the solenoid valve; the other port connects to the carbon canister.
Purge valve solenoid:

The carbon canister is normally mounted on the passenger side frame rail near the smog pump pulley.
Carbon Canister:

 

[Griswald]

Thanks for the info! I deffinately plan on using it, I just disconnected it for the photo and inspection.
I'd assume it works because the car doesn't smell like fuel under the hood whether it's first thing in the morning, or when I'm checking things while it's idling.
But, could this thing be a possible culprit to my 41 & 91 code issue? Since it has to do with vacuum and fuel trims?
I mention fuel trims because I failed emissions due to high hydrocarbons and NOX.
Yesterday I got some new cats welded on, but haven't gone back to the test center yet.

 

[Mustang5L5]

How old are your o2 sensors?

 

[Griswald]

I just replaced them, about 2 weeks ago, with new Bosch ones. I think I'm going to have to saddle up and pull the upper intake, so I can get to that orange ground wire.