Spark Knock noise?

1slow370 · 01-25-2014, 01:44 AM

or its a bad batch of gas being that your notheren could be water what with the cooler weather and all try a couple bottles of heet and burn the gas down some to see if it goes away.

SouthArk370Z · 01-25-2014, 07:33 AM

P0300 is a Cylinder Misfire Detected Random Cylinders error. By itself, doesn't mean much.

How immediate is "immediately"? As soon as you started the engine? If so, then it may not be the gas as the new gas takes a while to make it from the tank to the engine.

The easy things to check are:
* Battery condition - a weak battery can cause problems, especially with modern, computer-controlled engines.
* Water/dirt in fuel - try some fuel system cleaner with methanol to clear the water. May need to change fuel filter.

Not so easy:
* Dirty TBs - after 61k miles, they probably need a good cleaning. DIYs on this site. If you decide to clean the TBs, go ahead and clean the MAFs while you are there.

01-25-2014, 01:44 AM	#1 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7252	or its a bad batch of gas being that your notheren could be water what with the cooler weather and all try a couple bottles of heet and burn the gas down some to see if it goes away. luigi90210 likes this. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

01-25-2014, 07:33 AM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324199	P0300 is a Cylinder Misfire Detected Random Cylinders error. By itself, doesn't mean much. How immediate is "immediately"? As soon as you started the engine? If so, then it may not be the gas as the new gas takes a while to make it from the tank to the engine. The easy things to check are: * Battery condition - a weak battery can cause problems, especially with modern, computer-controlled engines. * Water/dirt in fuel - try some fuel system cleaner with methanol to clear the water. May need to change fuel filter. Not so easy: * Dirty TBs - after 61k miles, they probably need a good cleaning. DIYs on this site. If you decide to clean the TBs, go ahead and clean the MAFs while you are there. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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