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Been getting a P0457 code and a P0455 code. Smoke tested 2003 GT and smoke coming out of a brand new gas cap. I’ll replace it with an OEM. Also got smoke coming out of the cannister vent valve solenoid- at the top of the solenoid itself. This is a brand new Dorman solenoid and the second one I put on - returned the first for the same reason. I don’t have a lot or pressure going through the evap system when doing the smoke test. Since I got smoke coming through the top of the brand new solenoid again it got my wondering if this is normal? Vehicle was off when i did the test. Any help is greatly appreciated.
 
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