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Have I got a strange problem for you to solve ---- #4577395
11/17/17 07:14 PM
11/17/17 07:14 PM
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
JimPghPA Offline OP
JimPghPA  Offline OP
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
I have a very strange problem with out 2001 Chevy Impala.

About a month ago the check engine light came an and I stopped at an Advance Auto Parts and borrowed their code reader. Code P0446 came up. The fellow at the counter said that the code is for the evap. vent solenoid. It is a part that is not easily accessed so I had a local independent shop replace it. The check engine light stayed out for a couple of days and it came back on. The same code came up, P0446. I've been pretty busy, but I stopped in the local independent shop again and he said he would have to smoke test the evaporation system. He said when I bring it to him to have the tank low in-case he had to drop the tank. A week ago I needed gas and only put 8 gallons in it which brought it up to 3/4 of a tank, because I knew that I would be driving enough to run it low before bringing it to the independent shop next week. I drove it about 150 miles and it was showing below 1/4, and the low fuel warning light came on just as I was driving it to the shop for the smoke test.

The independent shop smoke tested it last night and fixes a bad hose under the hood.

I got it back today, the gauge was reading below 1/4, and I immediately took it to a gas station to fill it up because I did not want to take any chance of running out of gas. I pumped 1.15 gallons of gas into it and the nozzle shut off. I squeezed the gas filling handle and the gasoline over-flowed from the tank.

For some reason with what I know is less than 1/4 tank of gas, the car will not accept gas at the fill neck. What a strange problem. I took it back to the independent mechanic and told him that I can't put gas in it because it is over-flowing when I do, and that it has less than 1/4 tank of gas in it. He said that all the work he did to it was under the hood. That he connected the smoke test system under the hood, and that the bad hose was under the hood.

What could be wrong? It does not make any sense. I never heard of a filler neck not accepting gas, and I know the gas gauge is correct because I drove it enough for the last week for it to have used up the 8 gallons I put in it last week that only filled it up to 3/4, and I know that with where the gauge was reading last week if I normally would of filled it up it would have taken between 12 to 13.5 gallons when I only put 8 gallons in it.

How can a gas tank not except gas when there is less than 1/4 of a tank of gas in it?


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577405
11/17/17 07:24 PM
11/17/17 07:24 PM
Joined: Feb 2013
Posts: 11,009
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 11,009
Phoenix, AZ
Bad evap vent solenoid again? Maybe the original was fine and the replacement is no good?


2015 Hyundai Sonata 2.4L 87k Motorcraft Synthetic Blend 5w30 & OEM
2000 Toyota Camry 2.2L 231k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577409
11/17/17 07:27 PM
11/17/17 07:27 PM
Joined: Jul 2013
Posts: 2,262
Outer Banks, NC
NormanBuntz Offline
NormanBuntz  Offline
Joined: Jul 2013
Posts: 2,262
Outer Banks, NC
I'm hoping you have a locking gas cap and that someone didn't put a foreign object in your tank.


2017 Honda Odyssey SE, 16K
2013 Honda Accord LX, 58K
2007 Honda Ridgeline RTS, 88K
2007 Infiniti M35, 107K
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577413
11/17/17 07:30 PM
11/17/17 07:30 PM
Joined: Jun 2002
Posts: 12,605
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,605
The Motor City
Does the filler tube have an anti-siphon feature built into it? It may have been jammed somehow during diagnostics. Shove a hose down and see if you can jiggle it loose. Just a wild guess.

Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577416
11/17/17 07:31 PM
11/17/17 07:31 PM
Joined: Sep 2014
Posts: 1,485
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,485
Toronto Canada
The evap system allows the air in the tank to escape via the charcoal canister. This makes room for the gas to enter the tank. Something is messed up. You need a mechanic that understands how the evap system works.
There are many youtube videos dealing with this problem.

Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577418
11/17/17 07:31 PM
11/17/17 07:31 PM
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
JimPghPA Offline OP
JimPghPA  Offline OP
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
I do have a locking gas cap.

I drove it practically every day for the last month since the evap. solenoid was replaced and filled it about once every 5 to 7 days.


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577419
11/17/17 07:33 PM
11/17/17 07:33 PM
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
JimPghPA Offline OP
JimPghPA  Offline OP
Joined: Aug 2009
Posts: 3,916
Pittsburgh,PA U.S.A.
It is only now after the leaking hose was fixed that it will not accept gas.


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Have I got a strange problem for you to solve ---- [Re: WobblyElvis] #4577422
11/17/17 07:34 PM
11/17/17 07:34 PM
Joined: Aug 2008
Posts: 20,705
ON, Canada eh?
StevieC Offline
StevieC  Offline
Joined: Aug 2008
Posts: 20,705
ON, Canada eh?
Originally Posted By: WobblyElvis
The evap system allows the air in the tank to escape via the charcoal canister. This makes room for the gas to enter the tank. Something is messed up. You need a mechanic that understands how the evap system works.
There are many youtube videos dealing with this problem.


+1 That is my thought.


'18 Dodge Grand Caravan GT - AMSOIL SS 5w20
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF
Re: Have I got a strange problem for you to solve ---- [Re: StevieC] #4577433
11/17/17 07:39 PM
11/17/17 07:39 PM
Joined: Aug 2006
Posts: 9,864
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,864
Central Washington
Originally Posted By: StevieC
Originally Posted By: WobblyElvis
The evap system allows the air in the tank to escape via the charcoal canister. This makes room for the gas to enter the tank. Something is messed up. You need a mechanic that understands how the evap system works.
There are many youtube videos dealing with this problem.


+1 That is my thought.

Yes, sounds like the EVAP is not letting the tank vent.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577435
11/17/17 07:43 PM
11/17/17 07:43 PM
Joined: Nov 2006
Posts: 20,359
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,359
MA, Mittelfranken.de
Bum new part tank not venting as you fill it. Bad diagnosis as usual, codes should only be an indicator of the area that needs inspecting not throw a part at it.


ASE L1, Master. Deutsch Meisterbrief.
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577442
11/17/17 07:49 PM
11/17/17 07:49 PM
Joined: Jul 2017
Posts: 336
PR CA, USA
2strokeNorthstar Offline
2strokeNorthstar  Offline
Joined: Jul 2017
Posts: 336
PR CA, USA
Needs a charcoal canister or the valves attached to it if it is like a Toyota. See if you can find a junk yard one. I dug pretty deep into the evap system on a 99 camry. The solenoid they replaced wasn't the problem on mine either. There should be a vent valve also. On mine one valve went bad and let junk into the other making it stick. The The purge valve doesn't do anything when filling. You need to do some testing. The mechanic fixed the leak and now it is sealed like it is supposed to be and showing the real problem.

Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577452
11/17/17 07:54 PM
11/17/17 07:54 PM
Joined: Apr 2008
Posts: 37,761
Ontario, Canada
OVERKILL Offline
OVERKILL  Offline
Joined: Apr 2008
Posts: 37,761
Ontario, Canada
Originally Posted By: JimPghPA
It is only now after the leaking hose was fixed that it will not accept gas.


Yeah, probably because it was venting out that hose and now can't.


2018 RAM 1500 Big Horn EcoDiesel
2016 Grand Cherokee SRT
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577454
11/17/17 07:55 PM
11/17/17 07:55 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
As mentioned, the tank is not venting. Kind of hard to put gas in a tank that's pressurized with air.

That mechanic should've smoke tested the car on the first trip to the shop. He's a hack.

Re: Have I got a strange problem for you to solve ---- [Re: Trav] #4577462
11/17/17 08:03 PM
11/17/17 08:03 PM
Joined: Nov 2006
Posts: 20,359
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,359
MA, Mittelfranken.de
Originally Posted By: Trav
Bum new part tank not venting as you fill it. Bad diagnosis as usual, codes should only be an indicator of the area that needs inspecting not throw a part at it.


Too late to edit. I should have said possible bum new part. The original should have been checked for proper operation before replacement and the new one checked before installation.


ASE L1, Master. Deutsch Meisterbrief.
Re: Have I got a strange problem for you to solve ---- [Re: JimPghPA] #4577475
11/17/17 08:10 PM
11/17/17 08:10 PM
Joined: Jun 2002
Posts: 19,430
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,430
Iowegia - USA
In my dealings with that code it was a clogged evap canister on both Chevy's and Nissans.


Why are oil filters placed over chassis rails and cross members?
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