Trying to figure out what this part is thought it was the purge valve but its not were getting codes for evap. Have replaced hoses & gas cap. Vehicle surges from time to time but if that part is taken off & blown out it will stop for a few days. Any ideas?
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The purge valve is up on the engine. the vent valve is by the gas tank or at the charcoal filter, the lines run from the tank and filter to the engine. the lines are plastic, except under the body, metal then. Codes would be nice. This would tell me where to look.
codes po441 po442 po455 po456. code po441 - EVAP system no flow during purge conditions.code po442 -EVAP system small leak detected conditions. code po455 - EVAP system large leak detected conditions.code po456 - EVAP system very small leak detected. possible causes loose damaged missing fuel cap.fuel tank sensor disconnected or failed. ORING on top fuel sending unit leaking.purge valve vapor line clogged disconnected or purge solenoid failed.vent solenoid not closing or has failed.
Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling
the fuel tank with the engine running could conceivable cause this code as well
or if the cap wasn't properly tightened. Any of the following could also be
A small leak in any of the EVAP hoses or fuel tank hoses
Here is what I could find for your code error as potential causes:
After market parts and accessories nonconforming to the EVAP system specifications. Damaged, missing or improperly installed fuel filler cap. Blockage in fuel vapor hoses/tubes (EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube) in EVAP system. Disconnected or cracked fuel vapor hoses/tubes in EVAP system. EVAP canister purge valve stuck closed. Canister vent (CV) solenoid stuck open. Fuel tank pressure (FTP) sensor malfunction. EVAP canister leaking. Fuel vapor control valve tube assembly blocked. Fuel vapor vent valve assembly blocked.
Obviously the gas cap would be the easiest and cheapest thing to fix. Just make sure it is put on correctly and tight. If it is not that, I would have to suggest to take it to a mechanic because the other problems on that list are not really DIY material. Hopefully it is the gas cap and you can take care of it yourself. Good luck.
P0441-- Evaporative Emission Control System Incorrect Purge Flow.
This indicates that a part of the EVAP control
system is no longer functioning correctly. The EVAP system consists of
many parts, including (but not limited to) the gas cap, fuel lines,
carbon canister, purge valve, and other hoses. The (EVAP) emission
control system prevents the escape of fuel vapors from a vehicle's
fuel system. Fuel vapors are routed by hoses to a charcoal canister for
storage. Later, when the engine is running a purge control valve opens
allowing intake vacuum to siphon the fuel vapors into the engine.
EVAP emission canister purge is controlled by a
valve which allows engine vacuum to pull stored fuel vapors from fuel
tank into the engine to be burned, rather than be vented to atmosphere.
A vacuum switch is used to detect when flow exists. If the PCM commands
purge and sees that the switch is closed (indicating no detected purge
flow) P0441 is set.
A code P0441 could mean one or more of the following has happened:
* Bad vacuum switch
* Broken or damaged EVAP line or canister
* Open in PCM purge command circuit
* Open or short in Voltage feed circuit to Purge Solenoid
* Faulty purge solenoid
* Restriction in EVAP solenoid, line or canister
* Corrosion or resistance in purge connector
* Bad PCM
Here are a few solutions that should be followed to fix this issue.
* Common Chrysler fix - Replace Leak Detection Pump / LDP
* Repair damaged EVAP lines or canister
* Repair open or short in voltage feed circuit to Purge Solenoid
* Repair open in PCM purge command circuit
* Replace purge Solenoid
* Replace vacuum switch
* Repair restriction in Evap line or canister or solenoid
* Repair resistance in purge connector
* Replace PCM Please rate and god bless:)