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Discussion Starter · #1 ·
I recently posted a thread about getting a P0171 & P0174 (lean bank 1 & 2) and a popping noise coming from the air filter box. I tried cleaning the IAC, PCV and sprayed around the intake manifold and vac line fittings with TB cleaner as well as cleaning the TB and MAFS without results.

Well, friends, I found the problem! A vac line running along the fire wall from the driver's side that connected to a square box and going to a canister type box on the passenger side of the vehicle had a melted spot in it. I replaced the hose and, after resetting the OBD II and driving the car about 100 miles, no CEL has reappeared.

Thanks to all for your helpful responses and advice.
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