LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Time for a new Charcoal canister?

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Old Nov 18, 2023 | 08:59 PM
  #1  
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Time for a new Charcoal canister?

While trying to chase down low vacuum, gauge read16 at idle warmed up, I came across greasy evap hoses. Cleaned and replaced the hoses. Found the bottom port had a few of these guys stuck in there. I tried my best to suck the remnants out. I coughed out a few. Gross

Does this mean I need a new Charcoal canister now?
Old Nov 18, 2023 | 10:59 PM
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Re: Time for a new Charcoal canister?

You found that in the EVAP purge solenoid? Or in the connection at the throttle body?

Time for a new canister. Don’t know if I've ever seen a replacement available, but then I never needed to look for one.
Old Nov 19, 2023 | 12:24 AM
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Re: Time for a new Charcoal canister?

Yes. In the bottom line. According to shoebox pics it's the line that goes to the Charcoal canister. But the line on my car goes to the other side of the intake. Is that not normal?
Old Nov 19, 2023 | 01:00 AM
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Re: Time for a new Charcoal canister?

Again just to make sure I understand…. the solenoid connection or the throttle body connection?

This is 94-97….. I never looked at a 93.

http://shbox.com/1/evap_sol.jpg

The EVAP line from the canister is bundled with the fuel supply and return lines. It peals out of the bundle 1/2-way down the driver side of the intake manifold, connects to a hard line that wraps around the front of the engine to the passenger side,, then becomes a hose that connects to the bottom connection on the EVAP purge solenoid. That's where carbon particles will collect.

If they somehow got through the solenoid, they would travel to the lower connection on the driver side of the throttle body.

The particles can jam the solenoid open and create a bit of a vacuum leak. Or they might jam it closed and disable the EVAP system.
Old Nov 19, 2023 | 02:32 PM
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Re: Time for a new Charcoal canister?

The bottom port of the Evap was where it was clogged.



Old Nov 19, 2023 | 02:37 PM
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Re: Time for a new Charcoal canister?

Vacuum went back up to 18 after cleaning it out
Old Nov 19, 2023 | 03:23 PM
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Re: Time for a new Charcoal canister?

Solenoid was stuck open.
Old Nov 19, 2023 | 05:23 PM
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Re: Time for a new Charcoal canister?

I don't understand how they could've gotten out of the canister. I cleaned it out, but it seems like if it's happened once itll do it again. I've been smelling fuel off and on for a couple months now.
Old Nov 19, 2023 | 06:54 PM
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Re: Time for a new Charcoal canister?

Performance started to seattle seahawks again, you know taper off. So I double checked the evap. Nothing visible until I tapped it a couple times on the sidewalk and dislodged twice as much as the pic above. I need a new canister.

How should I go about cleaning out the line?
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