![]() ![]() Maybe the o-rings at the unions where the nylon fuel vapor line are leaking? Or the charcoal canister or lines themselves might be compromised. I believe in this situation your fuel vapor leak detection pump is sensing a leak (whether there is one or not) and reporting it to the engine computer, which stores that code. IIRC the P0442 means that there is a leak between the fuel purge valve and the charcoal canister and fuel tank. ![]() So if the engine starts really rough and sounds bad, there might be more at play than just that code. ![]() A P0442 code does not always directly correlate to poor engine idling. Click to expand.I think there is probably a difference between the sound/feeling that the engine wants to shut off and the P0442 code. ![]()
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