Question about GMC R1500

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When at idle it is rough and when running it has a miss at driving speed.

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Replace the plugs and wires.

Posted on Jul 19, 2009

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I have a 1994 Honda Accord 4 door v6. I have rough idle when in drive and smooth idle when in neutral. Also rough take offs from a stop or slow speeds. If I pump the gas pedal a few time the rough take...


  • does the engine miss? bumps is a rythmic pattern?
  • an engine miss will appear to diminish at higher rpm due to centrifical force.
  • other possible problem broken or flat motor mount.
  • is the idle rough in reverse?
  • if not
  • open hood
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  • Left foot on brake (hard)
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Sometimes a rough idle like that is a fuel filter. As you've already done the plugs and wires the fuel filter would be my next bet.

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The cam or crank sensor is going out when driving at high speeds. I would have those parts check, and have the fuel pressure check , fuel filter change to be on the safe side.

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