Question about 2003 Ford Ranger Regular Cab

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Ranger 2003 ranger 3.0 stalls when accelerating

I have replaced everything on this thing from fuel filter to air filter, mass air flow sensor, coil pack, wires and plugs, cam position sensor. I am baffled and dont know where to look for the problem now. I have had the fuel pump out to replace it too bu when I went to put the new one in it was the wrong one. they sold me one that wasnt for flex fuel. Parts are hard to come by for this thing where i live. The truck runs great except for when you accelerate hard taking off or passing someone. Then it cuts out, rpms drop and it comes back over and over until you let off. It doesnt do it all of the time. It can do it really bad one day and not at all the next. I drove it about 140 miles yesterday with no problems. Go again today and it does it terrible. Any help with this would be greatly appreciated....

Posted by on

  • badluck911 Aug 16, 2008

    The check engine light has never come on and yes I have tried having the codes read by my mechanic. He says there is no codes displaying. I dont know if this is true but he says that the check engine light has to come on for it to throw codes.. Of coarse the stupid thing wouldnt act up when i left it with my mechanic so he just thought I was crazy. That is why i started replacing some of the more inexpensive parts thinking i might get lucky and fix it myself.....

  • Theroad Dec 09, 2008

    In neutral and rev to about 3 to 4 K rpm it drops power pack and forth.



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I guess I have to ask is the CHECK ENGINE LIGHT ON? I have seen a crack in the air intake hose that only opens up on hard acceleration because of the engine torque Im sure you looked at that, just mentioning it.
Has a TPS been check don't just replace parts test then replace sure its slower but sure is less expensive and you learn something too.
If the engine light is on, get the code then contaact me and Ill tell you how to TROUBLESHOOT AND DIAGNOSE NOT JSUT CHANGE PARTS

Posted on Aug 16, 2008


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03 Nissan Altima showing codes P0304,P0102,P0154,P0113 what are they and how do i repair the problems.

Hi Chris.

p0304 = Number 4 Cylinder Misfire Detected

Faulty spark plug 4
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Fuel injector 4 harness is open or shorted
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The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4.

p0102 = Mass or Volume Air Flow Circuit Low Input

Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
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Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner.
Reset code and drive vehicle.
If the code comes back, it may be necessary to replaced the mass air flow sensor.

p0154 = O2 Sensor Circuit No Activity Detected Sensor 1 Bank 2

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Front Heated Oxygen Sensor Bank 2 harness is open or shorted
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Inappropriate fuel pressure
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Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.

p0113 = Intake Air Temperature Sensor Circuit High

Faulty Intake Air Temperature (IAT) sensor
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Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

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  • Possible causes
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    - Dirty mass air flow sensor
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    - Mass air flow sensor circuit poor electrical connection
  • Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
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    - Excessive smoke
  • the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
2003 NISSAN Altima Sedan OBDII Codes List

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air flow mass sensor is flowed up dirt gets in and causes it to respond very slow... good luck..........

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1 Answer


many thing cause engine stall out while driving faulty mass air flow sensor. stopped up fuel filter,faulty fuel pump check fuel pump fuse and relay.faulty alternator look for lose wires on alternator or ignition coils to module.faulty PCM. best code scan vechicle first before buy new parts but first thing to do replace fuel filter see if problem still occurs.

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If it has a Mass Air flow sensor in the iar intake, clean the internal parts (heated Wires) with carb cleaner. Do not brush.

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