Subject	Out of ideas...air leak
Posted by	HK'S Z on April 18, 2012 at 1:52 PM
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Message	The Z has had a misfire problem in the 2500-2800rpm range for quite some time now. Tested everything I can think of via DataScan. Got new coils, new CAS, new injectors, new FPR, Dampner, fuel lines, PVC etc. Boost leak tested twice and no leaks. Pressure takes about 2 min to go back to 0. When the car is running I can hear a air leak at the back of the motor by the AAC that is only audible when the throttle plates are open. I tried to replicate this during a boost leak test without success. When I first open the throttle bodies with the engine running I can hear a very loud "swooshing" sound from the back of the motor by the AAC. Any ideas what this could be? Car seems to running lean because of this and gets very hot when I drive it (does not overheat). I dont know were else to look. Also replaced temp senser and deleted the PTU sub harness etc. Thanks.
Follow Ups	Out of ideas...air leak - HK'S Z 13:52:05 04/18/12 You still have the EGR installed? - ZXoltan 15:20:42 04/18/12 I'd look there first also. (n/m) - Gordo 93TT Daytona 15:41:18 04/18/12 ZXoltan - Yes I have to have it since I am in Cali - HK'S Z 16:45:09 04/18/12 Cap/pinch the vacuum line to the egr valve. - soulpwr 16:11:40 04/19/12 If I'm not mistaken the valve can leak for other - ZXoltan 06:22:39 04/20/12 Soulpwr/ZXoltan - Thank you, I will check it out this - HK'S Z 09:29:57 04/20/12 Spark plugs? - gnozahs 20:45:35 04/18/12 Gnozahs - Spark plugs have about 50 miles on em. - HK'S Z 09:52:21 04/19/12
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