Nicholas Cove
Senior Member
With the system being monitored in inches of h20 I'm wondering if they are sensitive to dirty filters for the esim fresh air tube. This truck had a moderate amount of dirt in the filter but nothing horrible.
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I finally found the problem at 143,000 miles and after the local dodge dealer (two smoke tests etc) and the mechanic who replaced my fuel pump (replaced leak detection pump, chacon canister, evap lines, another fuel pump under warranty two luge cylinoids, three gas caps etc). The problem was the nylon line coming from the fuel pump down past. The leak detection pump was installed where the line was leaning on the leak detection pump, and resulting in a not complete seal. I repositioned the line and there is no small evap leak or replace gas cap light. Truck runs like new with no codes!!! RAM technicians and local mechanic could not diagnose the problem. I, not a mechanic, noticed this line leaning on top of the leak detection pump did not appear normal after I paid $75 for an OEM leak detection pump. I have a couple of extra gas caps, Luger valves and an extra leak detection pump.The only thing I can think of at this point is a PCM update might help. It's going to be my next solution if mine comes back....