First, on the 4 cylender, there is only one bank. So, in general the engine is lean which should cause better fuel mileage. Next, the hose from the purge solenoid shouldn't be plugged. It should run to the charcoal canister then to the intake to reburn fumes. That could be causing the lean mixture. Finally, have you checked the O2 sensor? It could be causing rich mixture as well as the temp sensor. Have you ever noticed black smoke from the exhaust?
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Monday, November 15th, 2010 AT 4:37 AM