Subject	My theory: You have a big vacuum leak. With the MAF
Posted by	Haasz32 on April 01, 2014 at 8:30 PM
	This message has been viewed 148 times.
In Reply To	Re: 300zx TT mysterious problems posted by 300zxProdigy on April 01, 2014 at 04:12 PM
Message	connected the ECU gets a metered air signal, but it's bogus because the engine is getting tons of unmetered air from the vac leak, causing very rough idling, not running, etc. When you disconnect the MAF, the ECU has no choice but to use the 02 sensors to determine how much fuel to send to the engine to keep the A/F ratio correct (or close to stoich anyway). Thus your engine running better with the MAF disconnected. You need to cap off your air intake where the filter is and pressurize your air intake system to listen/feel for vac leaks and fix them.
Follow Ups	300zx TT mysterious problems - 300zxProdigy 11:08:15 03/31/14 Did you forget a ground for the MAF - -Grimm- 12:17:41 03/31/14 Re: Did you forget a ground for the MAF - 300zxProdigy 20:24:41 03/31/14 Re: 300zx TT mysterious problems - 300zxProdigy 16:12:57 04/01/14 My theory: You have a big vacuum leak. With the MAF - Haasz32 20:30:04 04/01/14 Sorry, I didn't see where you said you did a vac leak test - Haasz32 20:43:08 04/01/14
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