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  1. H

    acceleration problem

    I recently replaced a head on my 91 Ford Explorer 4.0 liter engine due to a blown head gasket. Now the engine starts up fine and begins by idling smoothly in the driveway. Then, after about a minute, it starts to stumble then shudders, catches itself and again idles smoothly. When I begin...
  2. H

    91 Explorer vacuum line diagram.

    Need a diagram for the vacuum lines for a 91 Ford Explorer 4.0 Liter engine. The diagram that Ford supplies under the hood in front of the radiator does not show all of the lines. Thanks
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