Spark Knock noise?

TedB370z

Thanks JoePro, I'm taking it to my local mechanic Tuesday but if he isn't successful I'll let you know.

I did end up taking out the fuel pump, its fairly simple. I used this how-to on upgrading the fuel pump for instruction on how to disassemble the fuel pump/filter/level sensor:

CJM Tech Site: A First Look: The 370z Fuel Pump Assembly

It was pretty funky, before pics of it disassembled, there was flakes and chunks of sewt, and the actual fuel filter wassaturated with more sewt, turned the water black when I cleaned it:

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After everything was cleaned, ran biodegradable degreaser and warm soapy water through the fuel pump (using a 9 volt battery and the green and black wires on the pump itself), then plain clean water, then used an air compressor and let it sit to dry everything out

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Its not a difficult unit to disassemble, just have to be patient, and I'm clueless as to why Nissan says it's not serviceable, and doesn't sell the fuel filters separate?

phunk

Nissan says that because what you cleaned is not the fuel filter. That is the fuel pump pickup. It has a rough mesh to prevent large debris from entering the pump which could damage it or jam it.

The fuel filter is insert molded into the fuel pump module. If you notice how your fuel pump has a black hose coming out the top of it, which then turns 180 degrees back down into the fuel pump module. That is the filter, and it cannot be replaced or serviced as you cannot open the molded housing.

Generally, you dont have to worry about that filter for a VERY long time.

The rule of thumb for fuel injected cars is to get about a 100 micron mesh before the fuel pump, to protect the pump. After the pump, you want a 10-40 micron mesh filter to protect the fuel injectors.

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