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<blockquote data-quote="coldair" data-source="post: 656641" data-attributes="member: 2151"><p>By disconnecting your battery you are actually cutting off power to the ECU, this action</p><p>resets the ECU. When the ECU is reset, all traces of error codes are erased. To determine</p><p>if you still have a "knocking" situation you will have to drive the car around for awhile to allow the ECU to detect and record the error, knocking usually occurs during hard accelaration and if the knocking is still there the error code will show up when you </p><p>initiate the diagnostic procedure, be very careful during hard accelarations and be</p><p>prepared to lift off your foot when your hear engine knocks or it's going to kaboommm!.</p><p></p><p>The high pitch humming sound is a norm when using a GTR fuel pump, could your problem</p><p>be because you had switched it back to your standard fuel pump?, maybe your standard</p><p>pump is weak?. Try going back to the GTR pump and see if your problem goes away.</p><p></p><p>The knock sensor is located by the side of the engine block under the intake manifold.</p><p></p><p>good luck !.</p></blockquote><p></p>
[QUOTE="coldair, post: 656641, member: 2151"] By disconnecting your battery you are actually cutting off power to the ECU, this action resets the ECU. When the ECU is reset, all traces of error codes are erased. To determine if you still have a "knocking" situation you will have to drive the car around for awhile to allow the ECU to detect and record the error, knocking usually occurs during hard accelaration and if the knocking is still there the error code will show up when you initiate the diagnostic procedure, be very careful during hard accelarations and be prepared to lift off your foot when your hear engine knocks or it's going to kaboommm!. The high pitch humming sound is a norm when using a GTR fuel pump, could your problem be because you had switched it back to your standard fuel pump?, maybe your standard pump is weak?. Try going back to the GTR pump and see if your problem goes away. The knock sensor is located by the side of the engine block under the intake manifold. good luck !. [/QUOTE]
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