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Author Topic: p0456  (Read 4048 times)

Offline CAP1

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p0456
« on: March 04, 2011, 09:48:54 PM »
i have a chrysler town and country with the code P0456. it's a small EVAP leak(.020 or smaller).

 how do i find the leak? there's no spiders in the vent tube.
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Offline F22RaptorDude

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Re: p0456
« Reply #1 on: March 04, 2011, 10:03:43 PM »
 :rofl bout the spiders, but my 15 year old mind is constricted, so i know nothing about car mechanics. Or I know basics  :D
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Offline Buzzard7

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Re: p0456
« Reply #2 on: March 04, 2011, 10:27:04 PM »
Fuel cap got a good seal?
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Offline gpwurzel

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Re: p0456
« Reply #3 on: March 04, 2011, 11:06:01 PM »
Put 1 cup of gasoline in there Cap, seal and leave for 5 mins. After 5 mins, drop in a lighted match, slam lid back down, and watch for where the flame comes out. That'll be ya leak (caution, you may have a bit more to fix after this)
 :D :D :D

And yes, I know squat about cars  :lol

Wurzel (film this if you do it, I need a laugh!!)

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Offline CAP1

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Re: p0456
« Reply #4 on: March 05, 2011, 07:32:53 AM »
Quote from: gpwurzel on March 04, 2011, 11:06:01 PM
Put 1 cup of gasoline in there Cap, seal and leave for 5 mins. After 5 mins, drop in a lighted match, slam lid back down, and watch for where the flame comes out. That'll be ya leak (caution, you may have a bit more to fix after this)
 :D :D :D

And yes, I know squat about cars  :lol

Wurzel (film this if you do it, I need a laugh!!)



good idea!!! that'd work kinda like a guy i used to know......when he had a short circuit in a car, he'd put a wire across the fuse terminals, and look for the smoke......... :noid :devil
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Offline RTR

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Re: p0456
« Reply #5 on: March 05, 2011, 07:51:18 AM »
Quote from: CAP1 on March 05, 2011, 07:32:53 AM
good idea!!! that'd work kinda like a guy i used to know......when he had a short circuit in a car, he'd put a wire across the fuse terminals, and look for the smoke......... :noid :devil

I guess that would work, but it's really hard to put the smoke back in once you let it out. :D

RTR

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Offline Shuffler

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Re: p0456
« Reply #6 on: March 05, 2011, 08:43:52 AM »
Figure out a way to pressurize it and then run a flame around it. Watch for flicker.
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Offline gyrene81

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Re: p0456
« Reply #7 on: March 05, 2011, 09:15:57 AM »
i had that problem on my neon (before i got rid of it)...the shop i took it too had someting that made a smoky looking vapor appear where the leaks were...had a bad line and canister.
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Offline smoe

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Re: p0456
« Reply #8 on: March 05, 2011, 11:07:46 AM »
Did you top off the tank recently?

Cars with fuel injection have the fuel pump in the gas tank. The gasket around the metal cover that is holds the fuel pump may have ruptured. This happens when fuel tanks are topped off. Seems a lot of pressure builds up and causes a leak in the fuel pump gasket.

But probably best to check to make sure the gas cap is on right.
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Offline CAP1

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Re: p0456
« Reply #9 on: March 07, 2011, 12:04:21 PM »
Quote from: smoe on March 05, 2011, 11:07:46 AM
Did you top off the tank recently?

Cars with fuel injection have the fuel pump in the gas tank. The gasket around the metal cover that is holds the fuel pump may have ruptured. This happens when fuel tanks are topped off. Seems a lot of pressure builds up and causes a leak in the fuel pump gasket.

But probably best to check to make sure the gas cap is on right.

found the problem.

 this lady had this vehicle to another shop sometime in the past for an EVAP problem. for whatever reason, they had unscrewed the schrader valve in the EVAP test port.
 when they reinstalled the valve, they never fully tightened it, allowing vapors to leak out of this test port.


 
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Offline dedalos

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Re: p0456
« Reply #10 on: March 07, 2011, 12:08:51 PM »
Quote from: CAP1 on March 04, 2011, 09:48:54 PM
i have a chrysler town and country with the code P0456. it's a small EVAP leak(.020 or smaller).

 how do i find the leak? there's no spiders in the vent tube.

Submerge the car in a pool and look for the bubbles  :old:
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Offline Dragon

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Re: p0456
« Reply #11 on: March 07, 2011, 12:22:45 PM »
Quote from: dedalos on March 07, 2011, 12:08:51 PM
Submerge the car in a pool and look for the bubbles  :old:


Bwaaahaaahaaaa
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Offline CAP1

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Re: p0456
« Reply #12 on: March 07, 2011, 12:33:12 PM »
Quote from: dedalos on March 07, 2011, 12:08:51 PM
Submerge the car in a pool and look for the bubbles  :old:

 :rofl :aok
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Offline Shuffler

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Re: p0456
« Reply #13 on: March 07, 2011, 01:03:35 PM »
You could also check the schrader ummm oh never mind. :D
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Offline CAP1

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Re: p0456
« Reply #14 on: March 07, 2011, 02:32:29 PM »
well, the thing is i almost missed it. i had my smoke machine hooked up to the test port, to try and find the leak. the system held tight for 25 minutes, so i went back and re-checked all the solenoids and vcv's. and the connections.
 the air in the fuel tank confused me a little, since we all know there is no air in the fuel tank too.........

 i really don't know what made me look at the schrader.......'cept for one thing.


 i must be AWESOME/

 :devil
« Last Edit: March 07, 2011, 02:34:12 PM by CAP1 »
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