Rough idle what causes a low oil pressure?, my 1994 mazda b4000 has hardly any oil pressure and won't run when my mass air flow sensor is plugged in??? what to do?

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.

code p0 refers to intake air temp sensor --circuit malfunstion causes are wiring open circuit(broken)wiring short to ground bad earth and ECM.
code po113 refers to mass air flow( MAF) sensor/ volume air flow (VAF) sensor --low input. Causes may bewiring short to ground MAF?VAF sensor faulty ECM
code po327 refers to Knock sensor (KS) bank 1--low input. Cause may be insecure (loose) KS poor connection- wiring ---short to ground incorrectkly tensioned KS and ECM

Try looking for a vacuum leak somewhere close to but after the Mass Air Flow sensor. This can cause both a bad idle and stalling.

Try a few if these ideas...

Priority Action Part Type Cause
1 Inspect Spark Plug Fouled, Damaged, or Broken Spark Plug(s).
2 Inspect Hose (PCV) Clogged or Collapsed PCV Hoses.
3 Inspect Wireset Worn, Damaged or Faulty Spark Plug Wire(s).
4 Inspect Distributor Worn, Damaged or Faulty Distributor.
5 Inspect Catalytic Converter Clogged or Faulty Catalytic Converter.
6 Inspect Fuel Pump Low Fuel Pressure.
7 Inspect TimingSet Slipped TimingChain or Worn TimingGear(s).
8 Inspect Knock Sensor Improperly Connected or Faulty Knock Sensor.
9 Inspect M.A.P. (Manifold Absolute Pressure) Sensor Faulty M.A.P. Sensor.
10 Inspect Throttle Position Sensor Faulty or Incorrectly Connected Throttle Position Sensor.
11 Inspect Mass Air Flow (MAF) Sensor Damaged, Loose, or Faulty Mass Air Flow Sensor or Circuit.
12 Inspect Air Cleaner Temperature Sensor Damaged or Faulty Air Cleaner Tempature Sensor.
13 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator.
14 Inspect Piston Ring Set Worn or Broken Piston Rings.
15 Inspect Timing Specification Incorrect Ignition Timing.
16 Inspect Fuel System Pressure Incorrect Fuel Pressure Being Delivered to Carburetor or Fuel Injection System.
17 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
18 Inspect PCV Valve Plugged or Damaged PCV Valve.
19 Inspect Valve Burned, Worn, or Sticking Exhaust Valves.
20 check idle stop solenoid - if faulty, could cause rough idling
21 inspect distributor cap/rotor - if burnt, could cause loss of acceleration

If it idles up and down real high, its the throttle body sensor. If it's a low up and down idle and runs rough it is mass air flow meter. If you unplug the mass airflow meter and it will just low idle (no up & down) then the mass air flow meter is bad.

replace the fuel filter,if this does not help,replace the fuel pump.

Not saying this for sure, but I had the same problem, and i have a 1994 xr7 V6 3.8 L , and all u need to do is set the idle down manually because your computer could have seen that the injector was stuck open, and tried to turn up idle to keep up with the amount of fuel being pumped, worth a shot :P

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.

Possible causes Intake air leaks Faulty front heated oxygen sensor Ignition misfiring Faulty fuel injectors Incorrect fuel pressure Lack of fuel Faulty Mass Air Flow (MAF) sensor Incorrect Positive Crankcase Ventilation (PCV) hose connection

Read more: https://www.autocodes.com/p2187_mazda.html

i read it could be the mass air flow sensor and or faulty spark plugs. also be sure to check all the little vaccum hoses for cracks.