What's the correct fuel pressure In a 94 Mazda b4000

There is a special spray cleaner for the Mass air flow and throttle position sensors. Don't use just any spray cleaner or you will destroy the sensors. If, after the cleaning, the problem persists, have them both tested. Run a diagnostic test with a code reader to dind out what codes the computer gives so you can get the correct replacement parts.

1994, most cars its in front of fuel tank
did you even look first? there?
some cars its on fire wall, (old cars)
following the fuel line, always works on all cars.
gas or diesel.
my comments are all gas (petrol)

now ill post the 1st line in the FSM (safety)_
If the fuel filter is being serviced with the rear of the vehicle higher than the front, or if the tank is pressurized, fuel leakage or siphoning from the tank fuel lines could occur. to prevent this condition, maintain the vehicle front end at or above the level of the rear of vehicle. also, relieve tank pressure by loosening the fuel fill cap. cap should be tightened after pressure is relieved.


is car stalled.> or is this a service , question, tune up.?

i logged in and bingo there it is by gas tank..
sure you didnt want to look and want us to .sure.

i would clean out tbe fuel tank and fuel lines, check for kinks.
Especially clean and test fuel pump and ensure all filters are clean.
May be an idea to clean throttle body too.

a 94 i believe uses a ignition module not a ecm these have the exact symptom you describe when starting to go bad eventually it will fail and not start at all if this is it

computer change

Ok, you need to keep checking other related items. How is the charging system, tune-up history, vacuum lines, braking (vacuum booster), and the fuel system (how is the fuel line pressure and has there been any issues with water in the fuel)?

fuel cap

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your power brake booster has failed, or the large vacuum line to it under the hood has come undone.

check the fuel filter or a possible leak in the fuel line or vacuum lines.your exhaust could be clogged causing too much back pressure

It could be a couple of things.
1) Check to make sure the wires are in the correct firing order.
2) Check to make sure th plugs are still good, including the gap.
If these don't work than you should probably have a mechanic look at it in person.