I have a 2000 Trans Am and Im having a problem getting gas into the car. I recently had the EVAP purge valve replaced because anytime i tried to put gas in the car it wouldnt take any at all. seems that the vent valve was stuck shut. now the problem i am having is that when the CEL comes on i cant put gas in it. but if the light is not on it takes gas normally. i had the PCM scanned and the only code it is giving me is a P0440 Evap system problem. anyone have any ideas on this?? any suggestions would be appreciated. was thinking about replacing the EVAP purge solenoid on the intake. all lines at the tank are good. when i replaced the vent valve i made sure to check everything because you have to drop the tank out of the car to even access the EVAP system.
This is a really odd problem. Can't think of anything in the EVAP system that could cause this. Anything having to do with the EVAP system works on vacuum and any failure in this system causes a vacuum leak to the engine, but will NOT stop you from filling the tank. As soon as the cap is removed--any vacuum is vented.
Is it possible that someone did you a dirty and stuck something in the filler tube? Check with a flashlight and not a match (just a suggestion). Or, check that when the gas cap is removed there is a good "whoosh" of vented vacuum. If not, then the gas cap is faulty and has to be replaced, but worse--it has allowed water vapor to meet with gas vapor and that will rust the little one way flapper valve within the filler tube. A stuck one way valve could cause the problems you are having.
On the road, stuck in Kingman AZ, such a sight to see....
Snow is in the forcast from Kingman to ABQ and that will put the new Conti "super tires" to a real test. So far, these are the best tires have ever had--they turned the stupid little ricer into a slot car in the twisties.
Is it possible that someone did you a dirty and stuck something in the filler tube? Check with a flashlight and not a match (just a suggestion). Or, check that when the gas cap is removed there is a good "whoosh" of vented vacuum. If not, then the gas cap is faulty and has to be replaced, but worse--it has allowed water vapor to meet with gas vapor and that will rust the little one way flapper valve within the filler tube. A stuck one way valve could cause the problems you are having.
On the road, stuck in Kingman AZ, such a sight to see....
Snow is in the forcast from Kingman to ABQ and that will put the new Conti "super tires" to a real test. So far, these are the best tires have ever had--they turned the stupid little ricer into a slot car in the twisties.
Hello,
The vent valve would have been my guess, but you replaced that. That leaves us with the fact that for some reason the tank is not venting when you try to put in fuel. You may want to inspect the charcoal canister for blockage. Or for that matter if the canister has lost any of its charcoal. It wouldn't be the first vent or purge valves I've seen with charcoal in it. I would take a look at the canister and vent valve first. Hope this helps. God bless.
-Chvrlt283
The vent valve would have been my guess, but you replaced that. That leaves us with the fact that for some reason the tank is not venting when you try to put in fuel. You may want to inspect the charcoal canister for blockage. Or for that matter if the canister has lost any of its charcoal. It wouldn't be the first vent or purge valves I've seen with charcoal in it. I would take a look at the canister and vent valve first. Hope this helps. God bless.
-Chvrlt283
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