Non Vented Gas
I have a 1997 Olds Cutlas Supreme (3.1V6) the MIL is on with a recurring code of P1441?
It seems to be a Fuel sysem error, The only work I did on the fuel system is a new Gas tank. Any ideas where the problem could be? There was a leak at the filler vent pipe (Accumulated rust stuck to the rubber) this was cleaned. The hose clamps were all replaced. The light comes on every few days. I can provide the Freeze-frame data if this would help.
The DTC is described as: "EVAP System Flow During Non-Purge"
Gas vapor from the gas tank gets stored in a charcoal canister to prevent it from venting to the atmosphere. When the computer commands a "purge" it opens a solenoid purge valve and another vent valve. It sucks fresh air into the charcoal canister and the gas vapors get sucked into the intake manifold. The computer senses the increase gas vapor and continues to purge until the gas vapor decreases. Then it shuts off the vent valve and starts to pull a vacuum on the canister, vacuum lines and the tank. It does this to detect a leak. If it pulls and holds a vacuum, the computer decides the system is sound. If it still sees air flow, it figures there's a leak somewhere in the system.
Since you did work on the fuel system, you still have a leak somewhere. Check all the vacuum lines going from the tank to the canister. Also, check all both the purge and vent solenoids to make sure no rust got sucked into the valve itself. Crud can keep a valve from closing.
Good luck
Rick
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com
Non Vented Gas
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