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Re: 2004 Freestar (Antifreeze Flow)
No, I don't think it's the vacuum regulator the problem, cause when resistance is too low compared to output resistance of PCM (I don't know what is it), voltage drops on the regulator. If you have less voltage, the EGR should be less active, so it should not cause the engine to choke.
Try to disconnect the connector, turn engine and see if the problem gones. Don't let engine run more than 30 minutes like that, just to confirm that the problem is related the EGR system.
If it's the problem, test the MAF, ECT and TPS sensor. They can cause the EGR system to not work properly.
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2003 Chevrolet Impala LS 3.8L OHV
2002 Ford Taurus SE 3.0L OHV (sold)
1998 Ford Windstar LX 3.8L OHV (sold)
2002 Chevrolet Malibu LS 3.1L OHV (sold)
2004 Hyundai Accent GS 1.6L DOHC manual (sold)
1995 Oldsmobile Cutlass Supreme S 3.1L OHV (sold)
2002 Ford Crown Victoria Police Interceptor 4.6L SOHC (sold)
A Windstar without having the check engine light is not a real Windstar.
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