ACCELARATION PROBLEM

  • Tiny
  • adi1991
  • 1997 Nissan Maxima
  • 200,000 miles

I have nissan maxima 1997 auto transmission. It has a problem that when I am accelerating it slowly the pistons knock and engine vibrate. But in sudden or fast acceleration the cars moves smoothly.

i already changed fuel pump and spark plugs with coil.

Wednesday, June 13th, 2012 AT 5:59 PM

7 Answers

  • Tiny
  • hmac300
  • Expert
  • 41,612 posts

Scan for codes and check vacuum at idle if 15" or belwo susmpect clogged converter

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Wednesday, June 13th, 2012 AT 7:43 PM
  • Tiny
  • adi1991
  • Member

Sir,
how can I check (vacuum at idle if 15" or below suspect clogged converter)and where I will find this.

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Wednesday, June 13th, 2012 AT 10:01 PM
  • Tiny
  • rasmataz
  • Member

You need a vacuum gauge -You sure the engine is not detonating/pinging if so check the knock sensor and also if the engine is overheating

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Wednesday, June 13th, 2012 AT 10:12 PM
  • Tiny
  • adi1991
  • Member

No the engine is not pinging. Only the problem which I told you. Piston knocking at the time of slow acceleration.

May be it is from gearbox?

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Thursday, June 14th, 2012 AT 6:38 AM
  • Tiny
  • rasmataz
  • Member

You need to verify where exactly that knocking is coming from-

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Thursday, June 14th, 2012 AT 11:56 AM
  • Tiny
  • adi1991
  • Member

Example - this knocking is same when we are accelerating car from 0 km at 2 gear or 3. Means piston knocking.

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Friday, June 15th, 2012 AT 8:34 PM
  • Tiny
  • rasmataz
  • Member

Could be piston slap/wrist pin-either way it has to be fix with that mileage

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Friday, June 15th, 2012 AT 8:51 PM

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