Question about 2002 Nissan Maxima

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Getting a ping on my '02 Maxima between 1800 and 2000 rpm. light to med load. I am using 93 octane gas. Timimg was recently retarded 2 deg at dealer but not much help. Analyzer showed no sensor faults. What should I check next?

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Hello , does the pinging only happen when the car is at normal running temp , or anytime you press the accelerator? What temp is the car operating at? It may be running to hot or to lean as well. It may have a valve timing issue cause by a faulty sensor. Quinn , Arizona

Posted on Jul 25, 2009

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I think that you may not be having a problem with the fuel itself but may have an improperly sealing fuel cap. That would turn the light on.

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Are u using the recommended fuel ? if so try running a couple of cans of fuel injection upper cylinder cleaner through the system with the next few tanks of gas, try LUCAS brand, it is among the best, the next step is to have the engine de-carboned by the dealer, this works very well, you can also remove an octane selection jumper, it retards the timing 2 degrees, that will most times stop the ping.

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