Could use some advice. I got CEL code P2187 (too lean at idle) together with symptom of hard start only after gas fill; other wise engine ran perfect. Saw a suggestion to try disconnecting evap input hose from purge solenoid, so I did that and it solved both the CEL code (after reset) and the hard start at fill up problem. What is the pro / con of leaving this hose disconnected permanently? thanks for any advice!