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Car running rought when u press the throtle there is a nocking noise i think this is the nock senser if i take the ht leads off the spark plugs 1 at a time starting from left they all make a nocking noise other then the secound one in does this meen this is the the 1 with the problem or the other 3 i have check the leads spark plugs and changed the injectors still got a problem can u help thanks craig vauhall vectra 2.0 sri 140 vreg 2000

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If you're getting ticking-type knock, I'd first look to the lifters. if it's a real hard knocking, it could be your main bearings on the lower end

Posted on Jul 29, 2010

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Red check Gage light on oil gage went all the way down.oil is full made a light nocking noise.still runs but makeing nocking noise.


Knocking noise is not a good sign. Could be the oil flow has been disrupted. Continued driving could damage the engine. Take it in for service immediately.

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POSSIBLE GEARBOX INTERNAL PROBLEM!!WISH I COULD HEAR THE NOISE!

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Whoa. Stop. Take the valve cover off. You'll probably see the problem. Maybe a rocker arm has come loose.

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When I put my car in drive I can here a little nocking noises but when I put it back In park or neutral the nocking sound... it sound like it could be coming from the belt area...


Try it with the serpentine belt off,could be the damper,could be also the bolts that hold the torque converter to the flywheel,just pulling a plastic cover will access the bolts.

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1 Answer

Engine nocking noise


I would have tried new pLugs and wires and using fuel injection cleaner in the regularly. You could also check to see that the Mass Airflow Sensor was not damaged.

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Alternater is nocking i think its goin out or just might need to


Alternator knocking ????is the alternator light on is it charging as is almost impossible to get a knocking out of a alternator and it still charge at the same time.
Start engine ind get a small plastic tube and put it on the alternator and put your ear to it and you should hear the noise real bad.
And you should feel it getting real hot after run for 3 minutes if not its not ALTERNATOR

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It sounds like you may have some sludge in your oil. When the engine is cold the oil is thicker and takes a while for the oil pump to pump it through the engine. The next time you change the oil. Do an engine oil flush first to clean the inside of the engine and ports. If this does not work you might have to have the oil pump checked. There is no need to worry as long as you have oil pressure and the knocking stops. I hope this helps. Don't forget to rate this answer.

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