95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

01' 4Runner - Thumping when cold

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Old 03-06-2013 | 09:43 AM
  #1  
Malaka2121's Avatar
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01' 4Runner - Thumping when cold

Hello all- New in this forum, so if this has already been asked, apologies! I have a 2001 4Runner SR5 4WD that has this rapid thumping/vibration sound coming from it. It only happens when:

-The engine/outside temp is cold
-I step on the gas while in "D" (if i put in in neutral and rev it, everything is fine)
-The sound increases as the RPM's increase, but seems to dissappear after the engine is warmed up
-I can feel the thumping - drivers side- front of car, feels like its where my feet are located

Thoughts?
Old 03-06-2013 | 03:03 PM
  #2  
kball's Avatar
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From: SoCal
You step on the gas while in drive, with your foot on the brake? I'm thinking misfire. How long since a tune up?
Old 03-06-2013 | 06:48 PM
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toyota4x4907's Avatar
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From: middle of no where Alaska
How cold is "cold"? Below freezing? Does the truck sit outside all night or in a garage?
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