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Re: New coil; still missing/bucking; '99 3.8L
In OP, he saids that he check the EGR valve operation.
To be 100% sure, the best is to go to highway when engine is below 113F (cold mark). Cause the EGR activates only beyond this temp. If it's not possible, disconnect the ECT and go at 50 mph. Then stop and reconnect it the fast as possible (within 10 minutes).
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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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