2002 Toyota Corolla rattle or pinging noise on accleration

Tiny
ROBSTOY
  • MEMBER
  • 2002 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 172,000 MILES
Upon accleration I hear this pinging noise or rattle; cannot pinpoint exact problem; I installed new plugs had eng decarbonized; used techron; stp; or Lucus fuel additives and still have this eng noise. There is no chek eng light. Over 3 yrs ago had eng tensioner pulley assy replaced. What could it be? I am thinking it could be a knock sensor; but have I have to remove intake maniflod just to get ot it and the sensors are not cheap. Rob
Monday, April 5th, 2010 AT 1:46 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
If enging is pinging, over time it can cause damage.

Best approach it to scan PCM in live data mode to see if PCM is detecting knock, if so PCM should retard timing up to 15 degrees.

If knock is detected and timing is not retarded then knock sensor or possible crank sensor.
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Tuesday, April 6th, 2010 AT 10:41 AM

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