I have a 1995 Mazda B2300 4 cyl. Gas keeps running into the motor. I have replaced the fuel pump, fuel filter, o-rings on the injectors, intake gasket, regulator, fuses, relays, and checked all the vacuum lines. What more can I do?
What exactly do you mean by "Gas keeps running into the motor."?
If you mean the engine oil level is rising and the oil smells like fuel, then only one of the parts you listed could cause that -- fuel pressure regulator.
Other causes could be a fuel injector (s) leaking and bleeding fuel into the combustion chamber with the ignition off, a problem with the evaporative emissions system pulling fuel into the intake from the fuel tank, or an extreme rich condition.
Let me know if we are talking about fuel in the crankcase, and if the check engine light has come on.
The fuel injection keeps running even when the motor has not turned over. I can turn the switch on and the injectors start running.
What do you mean by "fuel injection keeps running"?
1 - There is fuel going into the crankcase (oil level rises and smells like gas).
2 - You hear a buzzing noise in the fuel tank with the key on (fuel pump should run for about 2 seconds when the ignition is turned on).
3 - You hear the fuel injectors clicking when the ignition is on, engine not running.
We need some more details in order to help.