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Tom · 01-31-2006

A speed density system like on a ZR-1 does not have a MAF (Mass Air Flow Sensor) to get coated with the oil from a K&N filter and give faulty readings. It uses a MAP (Manifold Air Pressure Sensor) which on a ZR-1 is located at the back of the engine. The MAP sensor and connections do sometimes get engine oil into them which causes erratic readings, softens the rubber parts of the connections, and makes it much easier for the connections to be forced off if you have the ZR-1 starting backfire caused by not holding the key in the start position long enough.

The K&N filter oil could possibly get in the IAC area but it is easy to remove and clean.

01-31-2006	#5
Tom Join Date: Jan 2004 Location: Southern CA Posts: 108	Re: Stock air filter cover? A speed density system like on a ZR-1 does not have a MAF (Mass Air Flow Sensor) to get coated with the oil from a K&N filter and give faulty readings. It uses a MAP (Manifold Air Pressure Sensor) which on a ZR-1 is located at the back of the engine. The MAP sensor and connections do sometimes get engine oil into them which causes erratic readings, softens the rubber parts of the connections, and makes it much easier for the connections to be forced off if you have the ZR-1 starting backfire caused by not holding the key in the start position long enough. The K&N filter oil could possibly get in the IAC area but it is easy to remove and clean.