1995 Toyota 4Runner engine knock @ cold idle

Tiny
ROCKYACOOK
  • MEMBER
  • 1995 TOYOTA 4RUNNER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
I have a new engine and have moved to where the night temperatures are between 25-35 degrees @ an elevation of 5000 ft. When I start my 4 Runner in the morning it has a loud knocking sound which stops when the idle drops. Also as I rev the engine there is a gurgling sound when I release the throttle. Is this a knock sensor or?
Wednesday, April 7th, 2010 AT 6:41 PM

1 Reply

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
The gurgling may be the air injection. The engine noise. Are you using a filter with a check valve? Those engines the filter lays on its side and will drain back into the engine overnight. The factory filters have a valve that keeps that from happening. Also you will want to use a thinner oil for the low temps. Try a 5w-30 and see if it oils faster int hecold
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Wednesday, April 7th, 2010 AT 10:14 PM

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