Subject	1993 300zx rough idle when warm, bad gas mileage.
Posted by	flyhotstuff on November 22, 2014 at 5:55 AM
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Message	I recently bought a 1993 twin turbo Z with 55210 miles. has a lot of power. I am getting really terrible gas mileage like 8 mpg. if i could get at least 16 MPG on city driving i would be happy with my purchase. When the car reaches operational temperature it starts to idle at 500 rpm and really rough, kinda like it's surging. but it stays around that rpm mostly. The gas tank doesn't appear to be pressurized as there is no whoosh sound when i open the gas tank. I am not sure if the gas cap is bad. when i slow down and just release the clutch the car starts jerking and the rpm drops to somewhere are 200 rpm when it jerks. I have the old style injectors if that helps.
Follow Ups	1993 300zx rough idle when warm, bad gas mileage. - flyhotstuff 05:55:26 11/22/14 Numerous things are possible. Have you run the codes? >> - ZUL8TR 07:23:14 11/22/14 Re: Numerous things are possible. Have you run the codes? >> - flyhotstuff 12:48:07 11/22/14 As a recient purchase, an inexpensive place to start - ttz'in (NorCal) 16:52:48 11/22/14 Re: 1993 300zx rough idle when warm, bad gas mileage. - flyhotstuff 17:32:08 11/23/14 Ran the codes. Code 12. - flyhotstuff 17:43:48 11/23/14 reset the ECU code 12 gone. now have a code 13. - flyhotstuff 19:49:21 11/24/14
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