Get the latest advice about your car

Get Started
Advice » Q&A » 1995 BMW 740i

Q&A

Ask Your Question

1995 BMW 740i

Question: 1995 bmw 740

Question

jeannette, Philadelphia, PA, March 07, 2009, 15:45
Profile_thumbnail
 Rookie

i step on the gas and when i do i hear a knocking sound and then when i release my foot and step on it again i do not hear nothing its only about 5 seconds

2 Answers
Answer It
Flag This
  • Medium-star Best Answer
    patrick mannion from Greg Solow's Engine Room, March 07, 2009, 20:42
    Profile_thumbnail
     Master

    First make sure your engine oil level is OK. Its hard to guess what is causing a "noise" without hearing the noise fist hand. Is this noise heard most when you fully floor the accelerator pedal from rest, if so this could be "pinging" due to poor fuel and would go away the moment you let off the accelerator pedal. A knocking sound in the engine could be caused by lack of lubrication which would be a lot more serious (and expensive). Has your engine oil pressure light ever come on or do you frequently have to top up your engine oil level?

    Flag This

  • Reply

    jeffpogi420, August 31, 2010, 21:54
    Profile_thumbnail
     Rookie

    I have this same problem. Everytime I come to a stop at a traffic light and accelerate, I have to accelerate very slow and steady for a few moments, ease off the gas then continue to accelerate like nothing ever happened. Can't avoid the "knocking noise" along with vibrations coming from under the car. (big problem when I'm in traffic on the freeway) I was told it could be a driveshaft problem. Something that has to do with the universal joint or bearings worn out or having the the driveshaft re-balanced or even replaced...any suggestions or advice?

    Reply
    Flag This

  • Answer #2

    Visitor, May 18, 2010, 08:24

    Cheak your aligment screws if they are tight enough

    Reply
    Flag This
Answer Ranks

This week's top 10

1 globalhelper 6 obdcar
2 milesauto 7 TimGoodreau
3 csubak30 8 raiderron
4 jose8889 9 Merrimack Auto
5 Autohaus Lake Norman 10 Camster