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High idle after MAF installation? - 1993 Ford Ranger SuperCab

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Unhook battery few minutes

Posted on Oct 17, 2013

  • Jeff Jordan
    Jeff Jordan Oct 17, 2013

    All procedures followed as well as unhook/re-hook plugs around the throttle body. No vacuum leaks detected



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02 Lincoln V6. Very high idle at start up, put engine under any load it hesitates and acts like the transmission is in neutral. High idle remains. MAF or ICV? Thanks

Have you tested the engine and transmission control module (PCM) for fault codes? If not do that first. A MAF will not cause a high idle, that would be either a engine vacuum leak or a sticking IAC (idle air control valve) or a warped throttle valve bore. If the transmission feels like "it is in neutral" then you have big problems, please elaborate on this transmission issue. Also let me know what kind of work has been done to try and find the cause of the problems you are having if anything.

Dec 17, 2016 | Lincoln Cars & Trucks

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How to set idle because it it too high

idle is preset uses sensors --try cleaning the throttle body use specific cleaner and same with maf sensor --also look at air filter may need changing -i would suggest the air idle control valve but your complaint is high idle not rough or fluctuating with nissian will need to do relearn when done cleaning throttle body
Idle speed to high

Sep 06, 2016 | 2006 Nissan Micra 1.4

2 Answers

How can I fix high idle?

In theory once the desired idle speed is programmed into the management system, in the absence of such faults as air leaks, sticking idle air control valve and suchlike it should be impossible for the idle speed to be much different from the programmed value because the ECU should continue closing down the amount of air bypassing the throttle butterfly until the idle is around the correct value.

I think you need to go back to basics and double-check the work to ensure everything is as it should be. In the absence of mechanical faults and ignoring the possibility of electronic problems a high idle must be caused by too much air entering the engine, either because the idle air control valve is not closing properly or because the throttle butterfly is not closing fully.

It is worth noting air can enter the intake through leaky diaphragms, split vacuum hoses or faulty pcv systems. It is also worth checking the egr valve if fitted.

Jan 24, 2016 | 2006 Chevrolet Cobalt SS

2 Answers

P0103 code. I cleaned maf still have same code and stalls. I disconnect maf still stalls. I changed it one year ago code come back after 4 weeks. I have 2000 Hyundai Elantra.

the ecm may be bad,
P0103 OBD-II Trouble Code Technical Description Mass Air Flow (MAF) Circuit High Input What does that mean? Basically this means that there is a problem with the Mass Air Flow High (MAF) sensor or circuit. A more technical description would be that the MAF circuit had higher than expected voltage (air flow). Other MAF sensor circuit DTC trouble codes are P0100, P0101, P0102, and P0104. Symptoms You will likely not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness. Causes A code P0103 may mean that one or more of the following has happened: The MAF may be disconnected, or a wiring connection may be bad The MAF sensor may be damaged The vehicle computer may be faulty (very rare) Possible Solutions The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures: Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires. Inspect for any air leaks near the MAF sensor. Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor. Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information) Replace the MAF sensor. Register now to ask a question (free) Related P0103 DTC Discussions 2005 Duramax 6.6 P0103 help I have no clue where to begin looking for the solution to this code. Mass Air Flow (MAF) Sensor Circuit High Voltage is the description of the code, I've looked on various forums and i cant seem to find a definite cause. Ive cleaned the MAF several times with MAF cleaner. I seem to only get this c... 2002 Hyundai accent L 1.5 P0103 Put in a new MAF sensor but code still remains for MAF sensor high voltage. Using scan tool, the airflow rate=920 cf/m and the intake air temp reads -40?F at idle. Both readings are way out of the norm. Not sure what to do next, any ideas would be appreciated. P.S. I traced back the wires for MAF se... 2001 Mazda MPV p0103 & p0174 codes recently, this minivan has a P0103 & P0174 code. researched about the codes and MAF sensor seems like the common denominator between these 2 codes although according to Mazda, P0174 affected part is the fuel injection system where fuel trim system too lean while the 103 has the MAF as the part ... Corolla with MAF codes p0171 p0100 p0101 p0103 I have a 2000 corolla that I bought last fall. It had soft codes that didn't store. Now it has hard codes 0171, 0100, 0101, 0103. Today it started chugging and lurching during hard acceleration. I was a Toyota technician 10 years ago, but never really dealt with this particular model. It has 11... 2002 3.8L Pontiac GPX (P0172, P0101 and P0103) Hello, I have been having some rough starting, rough idle and stalling issues. I have printed off the P0172 page and started to replace items. Two weeks agao I got MAP codes. 1. So I replaced the MAP. It still had a stalling issue/rough idle. 2. So I changed the Idle control, PCV, cleaned my air fi...

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May 30, 2015 | 2000 Hyundai Elantra

1 Answer

Why is my car sputtering?

Heres a long shot, check out the EGR valve it may be plugged with carbon. But first check and or clean the Mass Air Flow sensor. You can go and get a can of MAF cleaner at any auto parts store. just follow the directions on can. The fine wires may be dirty or corroded on the MAF sensor. An engine with a bad MAF sensor may be hard to start or stall after starting. It may hesitate under load, surge, idle rough or run excessively rich or lean. The most basic test is to unplug the MAF while the engine is turned off, and then start it. Most of the time it will run better without it, if the sensor has failed. Good-Day!

Jul 25, 2014 | 2003 Pontiac Grand Am

1 Answer

My 05 Jetta idles high but when Mass airflow sensor is unplugged it idles normal. What can cause this

When you unplugged it, the computer used default settings to measure incoming air, I think. Try cleaning (gently) the MAF sensor with MAF sensor cleaner, or a suitable sensor- safe spray cleaner..

Dec 04, 2012 | Volkswagen Jetta Cars & Trucks

1 Answer

98 ford taurus starts runs 5 seconds then dies

Something is disconnected.Is the MAF (mass air flow tube on ) is the MAF electrical part connected in its socket,Vacuum hose to the intake manifold. (Will have a way high idle and you would hear it) Idle air control hook up? Can you maintain a high idle pressing on the gas pedal,if you can the IAC(idle air control) is the problem,other than that some thing is disconnected.

Mar 17, 2012 | 1998 Ford Taurus

1 Answer

2004 Sebring with 2.7 engine. MAF needs cleaned and hpoefully not replaced. Need help locating and the procedure for removing, cleaning, and replacing. Thanks, Keith

I wouldn't remove the sensor. Get yourself a can of electrical parts cleaner. They have it at most car parts chains. Then, just take off the air filter and look inside the inlet. The sensor should be right there. Don't touch it. Just give it a couple of good sprays. More if it looks dirty. I have pasted info below on you system that I copied from Let us know if you have more questions, and thanks for using FixYa!

Operation The Mass Air Flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The Electronic Control Module (ECM) uses the MAF sensor signal to provide the correct fuel delivery for all engine speeds and loads. A small quantity of air entering the engine indicates a deceleration or idle condition. A large quantity of air entering the engine indicates an acceleration or high load condition. The MAF sensor has the following circuits:

An ignition 1 voltage circuit A ground circuit A MAF sensor signal circuit An IAT sensor signal circuit A low reference circuit

The ECM applies 5 volts to the MAF sensor on the MAF sensor signal circuit. The sensor uses the voltage to produce a frequency based on the inlet air flow through the sensor bore. The frequency varies in a range of near 1,700 Hertz at idle to near 9,500 Hertz at maximum engine load.

Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Disconnect the negative battery cable.
  3. Remove the air pump assembly.
  4. Remove the 2 bracket mounting bolts.
  5. Remove the bracket assembly.
  6. Disconnect the electrical connector to the Mass Air Flow (MAF) sensor.
  7. Twist the MAF sensor sideways and remove it from the bracket.
  8. Remove the rubber mounting.

    0996b43f8020291d.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Remove the 2 bracket mounting bolts

To install:
  1. Install the rubber mounting to the MAF sensor.
  2. Twist the MAF sensor sideways and install it into the bracket.
  3. Connect the electrical connector to MAF sensor.
  4. Install the bracket assembly.
  5. Install the 2 bracket mounting bolts.
  6. Install the air pump assembly.
  7. Connect the negative battery cable.


  1. Verify the integrity of the air induction system by inspecting for the following conditions:

    Damaged components Loose or improper installation An air flow restriction Any vacuum leak Water intrusion
  2. With the engine running, observe the scan tool Mass Air Flow (MAF) sensor parameter. The reading should be between 1,700-3,200 Hz depending on the Engine Coolant Temperature (ECT).
  3. Verify that any electrical aftermarket devices are properly connected and grounded.
  4. Inspect the harness of the MAF sensor to verify that it is not routed too close to the following components:

    Any aftermarket accessories The secondary ignition wires or coils Any solenoids Any relays Any motors
  5. A low minimum air rate through the sensor bore at idle or during deceleration may cause a DTC to set. Inspect for the following conditions:

    Any deposits on the throttle plate or in the throttle bore Any vacuum leak downstream of the MAF sensor
  6. Inspect for any contamination or debris on the sensing elements of the MAF sensor.
  7. Inspect the air induction system for any water intrusion. Any water that reaches the MAF sensor will skew the sensor and may cause a DTC to set.
  8. A Wide Open Throttle (WOT) acceleration from a stop should cause the MAF sensor parameter on the scan tool to increase rapidly. This increase should be from 3-10 g/s at idle to 150 g/s or more at the time of the 1 to 2 shift of the transmission. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
  9. Inspect for a skewed or stuck Engine Coolant Temperature (ECT) sensor.
  10. Test for a high resistance of 15 ohms or more on the ignition 1 voltage circuit. This may cause a DTC to set. A high resistance may also cause a drivability concern before a DTC sets.

The Barometric Pressure (BARO) sensor that is used in order to calculate the predicted mass air flow value is initially based on the Manifold Absolute Pressure (MAP) sensor at key ON. When the engine is running, the BARO value is continually updated near WOT. A skewed MAP sensor will cause the calculated mass air flow value to be inaccurate and may result in a no start condition. The value shown for the MAP sensor parameter varies with the altitude. With the ignition ON and the engine OFF, 101 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 1,000 feet (305 meters) of altitude.

Dec 16, 2010 | 2004 Chrysler Sebring

1 Answer

High idle on 97 silverado

sounds like the idle air is gone

Apr 10, 2010 | 1997 Chevrolet K1500

1 Answer

High idle

Have the idle air control valve checked, might be malfunctioning.

Dec 22, 2009 | 2002 Chevrolet Impala

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