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Old 07-16-2015, 10:41 PM   #1
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Info on temporary chassis gas tank from chassis builder

I was looking on the internet for info of a Ford F53 chassis under a 2006 Fleetwood Flair 33r.
A document from Ford for the body builders talked about replacing the temporary delivery fuel tank with the final tank which is provided by the coach builder. They stated the temporary tank was only 5 or 10 gallons.

Is anyone aware of the details....do all chassis builders do this.

We were trying to track down a disconnected vacuum line in the engine bay that was "supposed" to go back to the fuel tank according to the emissions sticker. The tank did not have any extra connection for this line. The disconnected line was terminated with a rubber coupling that should normally connect to a plastic nipple (to connect two hoses together).


My thought is the coach builder installed a bigger tank WITHOUT the vacuum connection and simply tossed the hose and left the pigtail coming from the vacuum accumulator dangling
.
Any thoughts???

Dan
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Old 07-16-2015, 11:09 PM   #2
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If the tank has no emissions venting , then I'm thinking they have issues with, a bunch of federal regulations.

Were you able to see anything that looked like a charcoal canister, and a vent control solenoid, because the manifold vacuum wouldn't go straight to the tank?
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Old 07-16-2015, 11:17 PM   #3
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Quote:
Originally Posted by Skip426 View Post
If the tank has no emissions venting , then I'm thinking they have issues with, a bunch of federal regulations.

Were you able to see anything that looked like a charcoal canister, and a vent control solenoid, because the manifold vacuum wouldn't go straight to the tank?
That is exactly what we thought. Looked at the tank, and only three lines.
two outlets from the pickup area (engine and generator supply), then one return line since it is fuel injected.

WE found everything that matched the emissions sticker, including a EVCM (electric vacuum control module).


The diagram shows a vacuum accumulator, the vacuum source comes from the air cleaner housing.
The line out on the diagram actually splits... and one line "should" go directly to the tank.

We also confirmed the check engine bulb was good. He has never gotten any fault codes or "check engine" light. Both of us checked for another hose that may have become disconnected.
Finding none, we assumed it came from the factory this way.
There were two canisters in series with the input coming from the engine area, and the output had a vented cap (exhausted to atmosphere). I am sure emission related.


This is the orig post: What does this vacuum line go to?

Regards,

Dan
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Old 07-16-2015, 11:29 PM   #4
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Were there any hoses from the two carbon canisters leading to the tank.
Because the emissions hook up on the tank, isn't necessarily close to the fuel pump, where you found the other 3.
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Old 07-16-2015, 11:48 PM   #5
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Quote:
Originally Posted by Skip426 View Post
Were there any hoses from the two carbon canisters leading to the tank.
Because the emissions hook up on the tank, isn't necessarily close to the fuel pump, where you found the other 3.
Nope...
WE confirmed 4 hard lines running in thru frame channel behind the canisters.
Two Brake lines, and two fuel lines. A 3/8" rubber line came into the evap canister from front of vehicle. (I confirmed they are emissions canisters). Out put of first canister went to 2nd canister. Output of 2nd was vented.

I agree, seems like the fuel tank would collapse if there was no way to get air into it as fuel was used. Maybe the gas cap handles this.
But the line feeding the canisters was 3/8" and came from the engine area.
Our open vacuum line is 1/4 hard plastic.

Dan
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