Depends entirely on which model, your driving habits, and any mods you've installed. Other things that affect mileage are engine conditions/maintenance, tire pressure, etc. That said, my bone stock DOHC non-turbo regularly gets 24 mpg on mostly county highway driving. I've gotten as high as 32 mpg for a long trip, but typically get 27-28 for long distance drives. Addendum: My 1992 Turbo typically got 29-31 mpg on the freeway on long trips, but city mileage varied widely, from 17 to 25 mpg. Kind of amazing for a 4000lb car with 300hp.
you have to drop the muffler and the gas tank
you may want to check if there is fuel reaching the fuel rail,if not you may have to reset the fuel pump.(inertia switch) also make sure you install the correct one. on fuel injected vehicles after "depressuricing" the fuel system you need to turn the ignition switch on for aprox 2seconds do this about twice , and it should re-presuriced the system again
first of all u need to check this part first to see if it is faulty but it is located at the end of the fuel rail and has one vacuum hose connected to it pull the hose off see if the hose is wet with gas if so replace the fuel regulator it should only pass vacuum not fuel when it passes fuel through it floods ur car causing it to crank several times before it starts and releases black fumes out of the tail pipe!to remove this part it has a ring holding it down at the rim and u will need some sort of ring plyers to remove the ring and replace the o ring as well to ensure proper installation for max performace!
let me just say that the gas prices started to rise more and more with Bush as our president!!