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  #1  
Old 05-31-2012, 01:28 PM
tadmaz tadmaz is offline
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Default P0442 evap code

2004 RAM 1500 4.7L SLT Quad cab, 85,000 miles.
I have been battling a P0442 code for a while now, used to be P0456. Replaced gas cap. Replaced NVLD and green o-ring seal that connects it to the evap canister. My NVLD goes right into the evap canister and has just one outlet to the filter. Replaced NVLD to filter hose even though it was fine. No change what so ever. Filter to purge solenoid hose looks fine. All hoses around the evap canister are fine. Vent hose from the filler neck to the tank is fine. Inspected filler neck and filler hose with mirror, they are fine.

After driving, there is a gas vapor scent when sticking my head under the driverside rear wheel well. The only thing that doesn't look right on the truck is the fuel pump nut (ring). Usually this is plastic, but mine appears to be metal and is QUITE rusted. See pic from link below. Would this cause an evap leak?

http://webpages.charter.net/tadmaz/fuelpump.jpg

Last edited by tadmaz; 05-31-2012 at 02:38 PM.
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  #2  
Old 05-31-2012, 01:58 PM
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snrusnak snrusnak is offline
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Yes it can set that code. P0442 is set due to a small leak in the evap system. It can be anywhere(filler neck, gas tank, evap canister, etc.).

I literally just had this code on my wife's aveo. Luckily our issue was a cracked gas cap seal. Replaced the cap and the light went off the next day. Good luck with yours.
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Old 05-31-2012, 02:49 PM
tadmaz tadmaz is offline
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After doing more and more searching, I found a pic of what the fuel pump nut looks like and one other guy who experienced the rusty fuel pump nut. Has anyone experienced an evap leak at this nut before? What else could be leaking near the filler/tank?



http://www.quadratec.com/products/51306_121.htm
http://www.ramforumz.com/archive/ind.../t-105794.html
nut: 55366299AA
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Old 06-05-2012, 10:36 AM
tadmaz tadmaz is offline
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I will replace these in the next couple weeks. I think if I will be able to fit a breaker bar and the spanner tool without lifting the bed or dropping the tank. If I remove the filler neck housing, I should be able to bend the filler hose out of the way still attached to the filler hose. The filler hose didn't want to budge.

Ordered OTC 6599 tool from Amazon for $45.

ring, lock, fuel module
55366299AA $7.07
O RING, Fuel Pump and Level Unit
55366298AA $16.73
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Old 06-05-2012, 11:00 AM
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I'm not sure that I understand what you're saying exactly, but there's definitely no way to remove the fuel pump(to replace the o ring seal and metal lock ring) without lifting the bed or dropping the tank.

I'd lift the bed twice before dropping the tank, it's much easier as long as you have a few neighbors to help lift. And make sure to purge the fuel before opening it up, as it is pressurized. You can pull the fuel pump relay and then start(or try to start) the truck and that'll purge it.
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Old 06-05-2012, 01:00 PM
tadmaz tadmaz is offline
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Just to change the o-ring seal between the fuel pump and the lock ring, I won't need to remove the fuel pump. Just remove the lock ring, the fuel pump will lift up slightly, remove the seal, replace, install new lock ring. There is enough clearance height-wise and horizontally for the breaker bar.
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Old 06-05-2012, 01:18 PM
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snrusnak snrusnak is offline
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Have you ever done it?

Every fuel pump o ring I've ever done had to be slipped on from underneath, not above. The fuel pump housing is probably about a foot deep.
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Old 06-05-2012, 02:34 PM
tadmaz tadmaz is offline
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Worst case I will just drop the tank. I'll have someone to help and two floor jacks. Can anyone else comment on this?

http://webpages.charter.net/tadmaz/fuelpumpdiagram.png
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Old 06-05-2012, 04:29 PM
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I haven't done one on a ram, but I'm almost positive they are showing the o ring and metal lock ring in the incorrect order. The o ring needs to be slipped up under the pump housing. Get someone else to verify though...

I'd strongly recommend lifting the bed. It's significantly easier. Just need a few people to lift it off and on.
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Old 06-05-2012, 05:51 PM
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lifting the bed is easier

dropping the tank is easy IF the tank is empty, the problem is getting it back up in, without crimping the vent tube, or hooking up the wiring correctly

i have not watched this video, but it may help you to decide on a course of action
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