Question about 2003 Chrysler Town & Country

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Hard start when cold, running rich, poor fuel economy

3.3L, flex fuel, running gasoline. 77,000 miles. When it is below 40 degrees F, the car will not start normally. I have to put the pedal to the floor to get it to start. Strong raw gas smell from exhaust. Engine light was on, code said O2 sensor bank one. Replaced O2 sensor.(old one was highly carboned). Replaced spark plugs. Cleaned intake. I'm getting about 11MPG city whereas I used to normally get 17MPG. Once the car warms fully up, it runs fine. Maybe some sort of air temp sensor is bad?
Thanks

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  • Anonymous Mar 18, 2014

    Drove it last night, working normal. This morning running very rough RPMs bouncing between 500-1000. Will eventually stall if left idling. Bad smell of gas, Had O2 sensor replaced maybe 3 weeks ago.

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Chrysler has a bulletin out for a simular condititon that involves replacing the pcm. Heres the bulletin number 18-005-04. This is only 1 possible cause , Fuel pressure, coolant temp sensor, thottle position sensor all can cause like problems. Seeing sensor values and fuel adaptives with a scan tool helps pin point problems.

Posted on Mar 08, 2009

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