My car is 1994 Nissan Altima. In the past month, it ran about < 10 miles/gallon gas while I drive locally, but driving in highway, it can be 20 miles/gallon gas. Feul filter, wires, spark plug, distributor (not only cap), one of the engine gasket were changed one and half years ago. What else could be? Oxysen sensor? How to diagnosis?
Saturday, April 8th, 2006 AT 4:22 PM