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Q: Trouble staring in morning or after sitting for long period on 2005 Pontiac Bonneville

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Willl not start right away and has an "ether" smell. Thinking of fuel filter or catalytic converter?
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It sounds like the fuel system for your 2005 Pontiac Bonneville is loosing fuel pressure while sitting. The best way to confirm this would be to connect a fuel pressure gauge, the gauge should hold pressure after the engine is turned off. If it does not, that would indicate a leak which would require further diagnoses. I would doubt very much that is problem is being caused by the fuel filter or the catalytic convertor.
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