Here's the basic testing procedure to follow when diagnosing the mass air flow sensor with a multimeter: Check for MAF sensor trouble codes with a code reader or scan tool. At about 86 F (30 C), you should get around 24K ohms. Engine. . Code P1121 Ford Description. You could apply heat with a hair dryer to see if the resistance falls as the sensor is warmed. Step 4. TEST 4: Testing The PIP Signal. Most mass air flow sensors can be removed by sliding them away from the tubing that’s holding them. Connect the black multimeter test lead (with a wire-piercing-probe), to the circuit identified with the letter B in the photo. The following test is an on-car test that checks the performance of the MAF sensor with the engine running. Quick test to tell if Mass Air Flow Sensor is bad or dirty which could be causing your car or truck to run bad or keep cutting. SELECT STORE. Spectra Premium® Mass Air Flow Sensor. To test for resistance, set the DVOM to Ohms scale. Mass Air Flow (MAF) Sensor Connector. 7 Symptoms of a Bad Mass Air Flow Sensor. You could apply heat with a hair dryer to see if the resistance falls as the sensor is warmed. 0 motor from a 93 or 94 truck but its got no maf its got a map so what do i need to change from maf to map sensor. $56. 5 volts to 5. The P0122 code may be accompanied by other TPS codes, so following the manufacturer's pinpoint tests for each code received may be needed to fix the complaint. If you need to just clean the MAF sensor, you can find this article here: Cleaning The MAF Sensor (at: troubleshootmyvehicle. 2. Disconnect it and then reinstall to insure fresh electrical connection to remove any. Disconnect and isolate battery ground cable, then depress brake pedal for 5–10 seconds. Subscribe and be notified f. The codes mean the ECM can not make the injectors rich enough to make the O2 sensors switch back and forth. 2: Connect a DVOM between MAF sensor harness terminal VPWR and the negative battery terminal; the voltage should exceed 10. 2. Edited by The Power Channel 2017Please check your car information before purchase. MAF Mass Air Flow Sensor Assembly for 95-98 Ford Contour 2. Video by: Crisp Line Metal Forming (are available!Showing one way I learn how to do things. Connect the black multimeter test lead probe the battery negative (-) terminal. Replacement mass airflow sensor. Increase the vacuum on the sensor using the vacuum pump. from the 1990's and 2000's. MAF sensor malfunction that DOES NOT light up the check engine light (CEL). These codes will help in the diagnosis of any problems you may have with your car. • Check engine oil for fuel contamination. 56 - $331. Circuit Descriptions Of The MAF Sensor Connector. 20 MPH = approximately 1. (8,000–208,700) Mass Airflow Sensor Replacement : $320 -$429. Let's get started: 1. 8L V6 equipped cars (to be more specific: 89-96). . -. I also get a. Connect the black multimeter test lead to the BLK/WHT wire of the MAF sensor connector . This article will show you how to test and diagnose a bad GM mass air flow (MAF) sensor on all of the early 90 thru' mid 90's Buick, Olds, Pontiac 3. Unplug the MAF electrical connector. Start the engine and let it idle for about 20 minutes or until the cooling fan comes on to allow the engine to reach operating temperature. 1. first things i did was goto the hardware store and get a 7/16 -14 threaded rod, 2 foot long. This procedure should work on most Ranger Mustang Taurus F150 etc. Below is a picture of how i did this. How Does The MAF Sensor Work? TEST 1: Testing The Power (12 V) Circuit. Measure the MAF output at pins C & D on the MAF connector (dark blue/orange and tan/light blue) or at pins 50 & 9 on the computer. I would start first with just unplugging it. 1: MAF sensor wiring schematic-OBD-I systems Ford MAF Sensor Testing, Ground & Signal Testing the Ground Circuit of the Ford mass air flow sensor. You now have to take the MAF out to clean it. 2. Set the multimeter to 20 volts. Fig. Screwdriver. The check engine light will definitely be lit on your instrument cluster and your Escort (or Tracer) may also display one or several of the following symptoms: MAF trouble codes that light up the check engine light (CEL) on your instrument cluster. You can find this tutorial in Spanish here: Cómo Probar El Módulo De Encendido De Ford (Montado En El Distribuidor) (at: autotecnico-online. The dirty MAF sensor makes it misfire during wide open throttle and throw a CEL. The exhaust is standard except I have a straight pipe to the back instead of a muffler, besides that my car is completely stock. It measures the amount of air entering the engine. 5. YOUR CAR HESITATES OR SUDDENLY JERKS FORWARD WHILE ACCELERATING. Report. If it fails this test, replace the MAF sensor and retest. It may hesitate under load, surge, idle rough or run excessively rich or lean. 0L 1998, Mass Air Flow Sensor by Spectra Premium®. Check to see that DTC P0102 is shown. This is great because it helps you narrow down the problem. With the red multimeter test lead and an appropriate tool, probe the MAF sensor connector's A circuit as shown in the photo. 9L；Compatible for 1993-94 Ford Ranger Mass Air Flow Sensor with Housing V6 3. TEST 2: Testing The Ground Circuit. This information is then used by the ECU to calculate the amount of fuel needed for the correct air-fuel mixture. 4L Diagnostic Tutorials. The mass air flow sensor measures the amount of air entering the engine or the air flow. On some vehicles this sensor is combined with the MAP/MAF sensor. light comes on when the engine goes closed loop. A completely failed MAF sensor will not send any airflow information to the PCM. 4. It is located between the air cleaner box and the throttle body. See the diagram. Test 2: We need a common ground to the truck. We’ll be testing your Ford Escort MAF Sensor by checking for power and ground first. When you reconnect the new sensor to the airbox and intake hose, it could remain loose, which would lead to trouble. Reattach the hose clamp and reconnect the wiring harness. Before replacing the sensor, however, the rest of the circuit should be checked for proper operation. Stop the engine and reconnect the connector for the mass airflow sensor harness. This method provides valuable information for diagnosing potential issues and ensuring proper engine functionality. . Disconnect the MAF sensor from its electrical connector. Reconnect the electrical connector into the MAF sensor. A change in the reading indicates a bad connector, which then has to be replaced. 3. 1993 OBD I Trouble Codes (Ford E150, E250, E350) Insufficient input from Programmable Speedometer/Odometer Module (PSOM) Engine Coolant Temp (ECT) sensor indicated -40°C (-40°F)/circuit open. This is usually because the air-fuel mixture becomes too lean, so the car engine “starves” due to a lack of food, and this will cause it to jerk. 6 Bad MAF Sensor Diagnosis. With the engine running at idle, use a DVOM to verify there is at least 10. Reset the code and drive the vehicle. Connect jumper wires from the sensor connector to the wiring harness. Check the voltage supply with the ignition switched on (circuit diagram for pin assignment is necessary). Check the engine light. New Mass Air Flow Sensor with Housing from 1AAuto. TEST 3: Checking Continuity Of The MAF RTN Circuit. The mass air flow (MAF) sensor measures the mass flow rate of air entering the engine. 9 dci engine; you can see the MAF sensor just above the airbox. Learn how they work, as well as how to clean them for. Although the mass air flow sensor on. MAF TEST 3: Testing The 2nd Ground Circuit. Connect a hand vacuum pump and note the current voltage from the signal wire. Bill. The symptoms of a bad mass air flow sensor include low engine power, poor fuel economy, an engine that won’t start, a check engine light on the dash and a gas smell from the exhaust fumes. The Subaru vehicles of this era used both the MAF method and the speed density method for fuel management. Extra 2% off with coins. TEST 3: Testing The 2nd Ground Circuit. One way is to unfold a paper clip and insert it into the back of the middle pin. accident damage, paint, dent/ding, questions it belongs in r/AutoBody or r/Diyautobody If you have tire questions, check out r/howsmytire and ask there. Initiate KOEO self test. 5. TEST 3: Testing The 2nd Ground Circuit. 3,485 satisfied customers. 0L], Tracer. I pulled a few codes including p0102 (MAF) and p0300 (random misfire). This is usually a silicone based oil and some cans will say "with silicone" but you're gonna have to check. If the circuit has an issue, replacing the sensor will not solve your problem. Some cars, (depending on year) give a 2 digit code, others give a 3 digit code, make sure you. (R) No Throttle Position Sensor (TPS) change in "goose" test. Place your multimeter in frequency (Hz) mode. The photo above depicts a 1. Testing the MAF sensor and how it respond to Hi air flow, low air flow and a leak. First, to cool your car’s engine down, you need to turn it off. The next step is to make sure the MAF sensor has Ground, for this, go to: TEST 2: Making Sure The MAF Sensor Is Getting Chassis Ground. The RED wire is labeled with the letter A in the photo above. Connect the black multimeter test lead to the battery (-) negative terminal. It’s also important to avoid touching the element in the MAF sensor. Connect the black wire of the LED to the number 5 circuit of the ignition control module connector. A mass (air) flow sensor ( MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine . Is voltage less than 0. If downstream of the Y-pipe there is a sensor, you have 1 sensor. 2L & 2. 3. If you have 12V (11. also check for a vacuum hose leak downstream of maf sensor. General numbers. Connect the black multimeter test lead to the BLK/WHT wire of the MAF sensor connector . By measuring the voltage or frequency output of the MAF sensor, you can assess its performance. Cleaning a Ford mass air flow sensor. TEST 4: Testing. 3. Connect to the vehicle’s computer and stream the MAF grams per second (GPS) reading. it was easier for me to remove the right heater core hose for drilling. In the case of any errors, the ECU shows a check engine light on your dashboard. A MAF sensor measures the density of the air entering the intake manifold. This process should take 30 minutes. Ford OBD1 Code Gathering. Most routinely, the air-fuel ratio will be measured. Place your multimeter in Volts DC mode. To access the sensor, the first thing to do is to unplug the connector. 3. Resetting the Mass Air Flow Sensor by Idling the Engine. 95. It is installed between the air filter and the intake manifold of the engine. IMPORTANT NOTE - Please check the description or use the year/make/model drop down bar and interchangeable part numbers to confirm the compatibility before. -. TEST 3: Testing The MAF Signal Circuit. Unplug the IAT sensor electrical connector. Fill yp your details to hear more from our experts and get the latest updates from Delphi. In a healthy airflow sensor, the signal from the sensor should increase with the RPM of the engine. 0. 8L MAF Sensor. If you find a sensor in each manifold or downpipe, you have 2 sensors. The CCRM has relays and switches inside that control or provide power to the engine cooling fan, AC clutch (to engage the AC compressor ), fuel pump and powertrain control module (PCM).