bdufpv
New Member
- Joined
- February 15, 2014
- Messages
- 9
- Reaction score
- 0
- City, State
- Phoenix Arizona
- Year, Model & Trim Level
- 2002 Ford Explorer
i have a 2002 ford explorer with the 4.0 sohc. the check engine light came on with p0401 (erg valve) and later p0455 (Evaporative Emission system leak: large). i think they are related and i will get to what is probably causing them to trip.
my first attempt to fix it involved removing the egr valve, checked the valve and it was moving under vacuum, cleaned it and the tube into the throttle body. removed the negative battery cable but the code soon returned. i stopped there and started to work on the p0455.
for the p0455 i started by looking at the evap purge solenoid (in the engine compartment by the battery). when i removed the two larger hoses (one from the canister and the other goes to the intake) everything seemed normal. when i removed the electrical connection from the solenoid gas poured out. i have since removed the electrical connection multiple times and gas continues to flow out. the last time i removed it i saw gas pour out of the vacuum line as well. this was the first time i noticed this. i am thinking that the only way gas will come out of the electrical connection is through the vacuum line and not from the house from the canister or the hose to the intake.
i did some research and read that the fuel pressure relief valve could be the issue. i disconnected it and the vacuum line was dry. i then turned the ignition, but did not start the car, gas came out of the fuel pressure relief valve-which would have gone into the vacuum line if it was connected.
my thought is this is how gas is getting into my vacuum lines. is the fuel pressure relief valve what needs to be replaced, are there other tests i need to do, or is there something else that could be causing gas to get into the vacuum lines?
some more info...the gas mileage seems to have gone down 3-4 miles per gallon and when the explorer is parked in the garage there is a very strong gas odor (I'm assuming it is coming from the gas in the vacuum line to the evap purge solenoid, it is almost dripping!). also when the gas tank is only 1/4 full it will stall at stops and right turns. i have read of the pumps being the issue with this.
Thank you
Brian
this is a link to the fuel pressure relief valve
http://www.autozone.com/autozone/re...ageId=0996b43f802e3ddb&CJPID=3663046&cmpid=cj
my first attempt to fix it involved removing the egr valve, checked the valve and it was moving under vacuum, cleaned it and the tube into the throttle body. removed the negative battery cable but the code soon returned. i stopped there and started to work on the p0455.
for the p0455 i started by looking at the evap purge solenoid (in the engine compartment by the battery). when i removed the two larger hoses (one from the canister and the other goes to the intake) everything seemed normal. when i removed the electrical connection from the solenoid gas poured out. i have since removed the electrical connection multiple times and gas continues to flow out. the last time i removed it i saw gas pour out of the vacuum line as well. this was the first time i noticed this. i am thinking that the only way gas will come out of the electrical connection is through the vacuum line and not from the house from the canister or the hose to the intake.
i did some research and read that the fuel pressure relief valve could be the issue. i disconnected it and the vacuum line was dry. i then turned the ignition, but did not start the car, gas came out of the fuel pressure relief valve-which would have gone into the vacuum line if it was connected.
my thought is this is how gas is getting into my vacuum lines. is the fuel pressure relief valve what needs to be replaced, are there other tests i need to do, or is there something else that could be causing gas to get into the vacuum lines?
some more info...the gas mileage seems to have gone down 3-4 miles per gallon and when the explorer is parked in the garage there is a very strong gas odor (I'm assuming it is coming from the gas in the vacuum line to the evap purge solenoid, it is almost dripping!). also when the gas tank is only 1/4 full it will stall at stops and right turns. i have read of the pumps being the issue with this.
Thank you
Brian
this is a link to the fuel pressure relief valve
http://www.autozone.com/autozone/re...ageId=0996b43f802e3ddb&CJPID=3663046&cmpid=cj