Spark Knock noise?

TedB370z · 01-25-2014, 11:17 AM

I bought the car at 47,000 and took apart the intakes and cleaned the TBs and the MAFS, just to be sure there was no oil buildup on the MAFs since the previous owner had installed K&N Typhoons.

Immediately as within a few minutes, which is what led me to believe it was just the gas....

but another issue is, only around 1000 rpm, I hear a rattle, I took off the strut tower brace, all the plastics, looked around with a flashlight, cannot find what or where its coming from, it almost sounds like a pipe hitting off something metal... its not valve tap or the spark knock noise, and its not rhythmic enough that it goes exactly with the engine speed, hopefully this isn't the flex plate. Is there a plate you can remove to inspect the flexplate? or is dropping the transmission the only way? Thanks.

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01-25-2014, 11:17 AM	#5 (permalink)
TedB370z Base Member Join Date: Aug 2013 Location: Pittsburgh, PA Posts: 87 Drives: 09 Nissan 370z Rep Power: 13	I bought the car at 47,000 and took apart the intakes and cleaned the TBs and the MAFS, just to be sure there was no oil buildup on the MAFs since the previous owner had installed K&N Typhoons. Immediately as within a few minutes, which is what led me to believe it was just the gas.... but another issue is, only around 1000 rpm, I hear a rattle, I took off the strut tower brace, all the plastics, looked around with a flashlight, cannot find what or where its coming from, it almost sounds like a pipe hitting off something metal... its not valve tap or the spark knock noise, and its not rhythmic enough that it goes exactly with the engine speed, hopefully this isn't the flex plate. Is there a plate you can remove to inspect the flexplate? or is dropping the transmission the only way? Thanks.