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280z Gas pig-whats common causes


Guest Anonymous

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Guest Anonymous

Well, its officially the season of the $2.50 Gallon of 89 octane here in davis. My 280z has been getting terrible mileage-about 10-12mpg in town... This is terrible. it used to clear 22mpg in town.

So this is whats been checked on it/done:

1. Air filter, fuel filter.

2. new wires. plugs recently done.

3. STP gas treatment

4. Throttle body sensor/wiring replaced.

5. AFM replaced with new unit, boots redone.

 

Could a mis-adjusted throttle body sensor cause bad gas milage? How can i get the car to run slightly lean? How can i reach the old milage? What can i check?

 

Thanks for the comments guys...

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Guest Anonymous

That big a drop calls for checking the bottom of the tank for a wet spot, watching the fuel pump for leak because of a seperating diaphram, checking all fuel lines both rubber and metal for wetness of gas and the filter too. Also lay out a sleeping bag back by the filler cap to discourage gas predators or, get a new locking gas cap.

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