Well, number of injectors is equal to number of cylinders. 1990 Z24 should be 6 cyl/inj.
I'd have the other injectors and the fuel filters checked.
Also, there's lots of little things you can do to improve your gas mileage. Good tires with proper air pressure. Avoid excessive start/stop/traffic-light in-town crap. Lots more tips can be found at
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Friday, May 4th, 2007 AT 7:53 AM