Question about BMW Z3

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When I get up to about 2000 RPM it makes a thumping or knocking sound until I get past it. 1997 Z3 Automatic

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  • Contributor
  • 18 Answers

Hate to break it to you, but it could be that valves a getting loose. Or as simple as cleaning Throttle flap :)

Posted on Oct 30, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: 96 buick century makes thumping noise when higher rpm is reached

Sounds like a classic motor mount problem. Might want to get the dogbone strut checked as well.

Posted on Nov 21, 2008

demonram440
  • 42 Answers

SOURCE: 1997 ram 1500 5.9 wont rev past 2000 rpm

well, the timing on your ram is computer controlled. is the truck in drive when this mis-fire occurs? or at idle? youve addressed part of your ignition w/the cap-rotor-plug wires. did you examine the old cap for carbon tracking? did you install the rotor properly? i know on my '97 ram the dist is feakin' buried in the engine it would be easy to rotate the rotor while installing/removing it so the timing mark is off. does your engine have the right plugs installed? your plug wires follow the correct firing order with your dist? you did not mention anything about your ignition coil. here is how to safely remove and check your ignition coil. disconnect battery-at the coil disconnect the lead wire (TOP) and primary (BOTTOM) from the coil. label your wires, or take a pic of your ign coil before you remove it so if you forget where the wires go, you have reference point. remove mounting screws and remove coil. clean coil to remove rust/dirt and wipe coil terminals off. inspect case for damage. with a multi-meter, check coil primary resistance by selecting ohm's and then place + and - leads on the pos/neg terminals on the coil, dodge used 2 brands of coils either a "diamond" or a "denso" primary resistance for the diamond mfr'd coil will be between 0.97-1.18 ohms. secondary resistance 11,300-15,300 ohms. Denso primary resistance 0.95-1.20 secondary resistance of 11,300-13,300 ohms. to measure secondary resistance place one of the leads to one the primary terminals and the other lead attatch to the large center terminal. compare your readings to the above values. if your readings are not within range of the above values, your problem is the ignition coil. other causes you may consider is faulty: speed sensor, throttle pos sensor/trans issues like bad pressure solenoid (actuates gear changes) a fault in your overdrive system. hope i have helped!

Posted on Feb 27, 2009

lemmingleejn
  • 173 Answers

SOURCE: knocking in the engine

Has the car recently been serviced?
Check your oil level, or anything different under the hood, ie, new oil stains, or signs of leakage.
This could possibly be the hydraulic tappits, that are in need of adjustment.
You'll need to hand over some green, to a descent mechanic tho.
But look for the obvious signs.
Hope that fixe'd'ya!


Posted on Jul 23, 2009

  • 1071 Answers

SOURCE: I have the following problem with my Audi a8, 2.8

may be coupling for all wheel drive or carrier bearing

Posted on Jul 27, 2009

dnewcombe1
  • 1564 Answers

SOURCE: knocking noise in 2000 beetle under 1000 rpm

You might need a new Knock sensor.

Posted on Aug 13, 2009

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96 buick century makes thumping noise when higher rpm is reached


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