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  1. D

    97 4.0 SOHC..Rough Idle..Replace Engine ???

    I haven't had the intake gaskets replaced. All the vacuum lines seem to be o.k. We've checked them repeatedly. The MAF sensor was replaced a while back. No change. No idea what the voltage output is. The fuel filter has been replaced. Not sure when it was replaced last, but I think it was...
  2. D

    97 4.0 SOHC..Rough Idle..Replace Engine ???

    I have a 97 Explorer with the 4.0 SOHC engine. It has about 121000 on it and has been maintained very well. It has had a problem with the RPMs dropping and bouncing at stoplights for awhile. It hasn't ever cut off but it'll make you think it was. It doesn't do it all the time and I haven't...
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