Anonymous Posted on Mar 23, 2010

Heard a knick-knack sound and then the engine shut

After only 2 kms on the road in the morning, i heard a knick-knack sound (similar to the sound of a truck or a diesel engine). Drove for another 2 kms and turned off the engine. Started the car after 45 mins. Sound was still there and drove for about 1 km and the sound became louder and then the engine shut down. I started the car and moved for about 3-5 meters and the engine shut down. I started the car again and the engine shut down immediately after. I tried starting it again but it wouldn't start anymore.

Mechanic checked my car with the following results:
- compression on the 3 front spark plugs are good; compression on the 3 back spark plugs are low
- fuel pump is ok
- timing belt is ok
- battery ok

4 more comments
Anonymous Mar 23, 2010

The oil was newly changed a week ago and is still full. The engine will crank but will not fire up. Will the knock sensor affect cranking too? What do i do next after checking the knock sensor if the car still will not fire up?
Anonymous Mar 23, 2010

thanks. spark plugs are all okay. i will disconnect the battery and try again. just wondering why the compression in the 3 back valves are low?
Anonymous Mar 23, 2010

thanks. spark plugs are all okay. i will disconnect the battery and try again. just wondering why the compression in the 3 back valves are low?
Anonymous Mar 23, 2010

thanks. spark plugs are all okay. i will disconnect the battery and try again. just wondering why the compression in the 3 back valves are low?
Anonymous Mar 23, 2010

codes, warning lights and spark plugs are all okay. Engine still cranks but does not fire up. what should i do next and why are the compression pressure in the 3 back valves still low?
Anonymous Mar 24, 2010

codes, warning lights and spark plugs are all okay. Engine still cranks but does not fire up. what should i do next and why are the compression pressure in the 3 back valves still low?

1 Answer

jamie

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Posted on Mar 23, 2010

jamie

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Knock sensor is working at least right but unfortuanantly thats all that is working

it is likely a knock isue check the motor oil it is not un usual for a nisan to knock when the oil is low but on rare ocation it will kick so hard the knock sensor will activate

jamie Mar 23, 2010

check the spark

what you can do is reset the computer by disconectin the battery for 30 secs to a minute then try and start it

aso check the codes

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