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.

Do you
have the same problem?
Yes
No
Wednesday, June 13th, 2012 AT 5:59 PM

7 Replies

Tiny
HMAC300
  • EXPERT
  • 45,702 POSTS

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

Was this
answer
helpful?
Yes
No
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.

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
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?

Was this
answer
helpful?
Yes
No
Thursday, June 14th, 2012 AT 6:38 AM
Tiny
RASMATAZ
  • MEMBER

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

Was this
answer
helpful?
Yes
No
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.

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
Friday, June 15th, 2012 AT 8:51 PM

Please login or register to post a reply.

Other Fuel System Pump Replace/Remove Questions