2002 Mercury Mountaineer rattling when accelerating

Tiny
JUSTIN09
  • MEMBER
  • 2002 MERCURY MOUNTAINEER
  • 4.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 154,123 MILES
When I press the gas at low rpms I hear a low rattling sound and as soon as I let off the pedal it goes away.I just noticed this sound when it started getting warmer outside and recently changed the oil to Pennzoil 5w 30 same as wait as the castrol oil I hade been using also recently charged spark plugs and wires any ideas of what it could be please comment thanks' ""
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Wednesday, April 8th, 2015 AT 9:02 PM

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Tiny
MHPAUTOS
  • EXPERT
Run a scan for a faulty knock sensor, start here.
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Thursday, April 9th, 2015 AT 12:10 AM

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