Questions tagged [maf]
Anything related to MAF (Mass Air Flow) sensors.
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MAF and MAP location
I have a 2000 Pontiac sunfire se 2.2 I’m having trouble locating the MAP and MAF sensors. The mechanic I took it to said he can’t work on my car cause it didn’t stall enough while driving my car.. ...
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MAF per RPM dummy data
I am just studying mechanics and I wanted to test some of the formulas on some "real cases".
More specifically I wanted to test volumetric flow rate and volumetric efficiency.
I was ...
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2006 f150 severe hesitation weird question
low rpm hesitation, very severe until (usually) waiting for higher geare
clean mafs, clean throttle body
no sounds from vac lines, no visible tears
while cleaning throttle body I noticed the plate was ...
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Getting P0101 after replacing MAF sensor
I am getting P0101 after replacing my MAF sensor. The freeze frame, which is the diagnostic reading app report at the time the code came in reports the following related metrics:
04 Calculated Engine ...
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MAF Clamping & Tuning
I am planning on making my normally aspirated engine into a boosted Supercharged Engine using the AEM F/IC 6. From many searches and forum posts I've heard I need to do MAF (Mass Airflow Sensor) ...
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MAF error after replacing short ram intake and MAF
I bought my 2004 Mazda3 used and it had a Short ram intake. I replaced the filter with a K&N filter that was slightly longer than the one that came with the car. It was jammed in there bending ...
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How to troubleshoot P0101 -- mass air flow?
I completely rebuilt my truck engine, the only thing I didn't do was take the block out. But I replaced all the gaskets and piston rings. Took it apart and reassembled down to a bolt. Then I drove it ...
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Car won't start with Mass Airflow Sensor plugged in
I was fixing the throttle cable on my 1985 Ford f150 and in the process of doing that I unplugged my MAF and removed the air intake pipe. After fixing the cable and putting the air intake back on my ...
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P0101, Negative LTFT, Low MAF at idle after Short Ram Intake install 2016 Mazda 6
Installed a Short Ram Intake setup in a 2016 Mazda 6 2.5L, basically a replacement of the stock air intake system and I am now getting a P0101, weird performance stuff, and weird fuel trims.
Fuel ...
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How do I remove this bolt to replace my MAF sensor?
I'm trying to replace the MAF sensor in my Mitsubishi 2003 Lancer ES GLi1.8, and it's bolted into a plastic housing that fits the air filter. The bolts are weird, in that they have a head about 2mm ...
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Cleaned MAF sensor and long term fuel trim dropped to -10%
I have a 2008 Honda Accord EX 2.4L. The long term fuel trim was at -3%, then I decided to clean the MAF sensor using CRC MAF sensor cleaner. My long term fuel trim went down to -10+% and short term ...
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No throttle Response at low RPM, Normal performance at normal high RPM
I own a 2007 Hilux, 1kd-ftv 3.0 diesel.
Recently my car was occasionally stalling or trying to stall at idle, and having complete engine hesitation from time to time, where the engine would rev when ...
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'03 Grand Prix, p0068, hard start, stall, and eventually no start
It's been very cold lately, so I didn't think much when my car began having a hard time starting. After a few days it would start, but only drove a few feet before stalling, giving a 'reduced engine ...
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2013 Chevy Malibu LT 2.5L
I saw your message about "don't go looking for trouble..."
I replaced my MAF 1.5 yrs ago along with the intake and exhaust VVT solenoids after codes p0013 p0014 would pop up. It ran ...
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MAF sensor problem?
i have a 2012 vauxhall Zafira 1.7cdti ecoflex motor which has low mpg, i have tested for obd2 codes but there are none,live tests show MAF sensor readings fluctuating from 7.9 to 15.11 g/S on tick ...
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Slow acceleration is working, but rapid acceleration is not
When I press the accelerator pedal slowly, the car normally accelerates, it does this in a good way, no lack power.
If I press the accelerator pedal all the way to the maximum in one rapid movement, ...
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What are best steps to diagnose a bucking engine/
My 1992 Nissan with SR20DE (2.0 liter 143 HP o2 and MAF equipped OBD I engine, 16 valve, fuel injected), bucks. I own this car for ten years now and a lot has been replaced. Not always in attempt to ...
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How come that with a worn MAF and lambda fuel economy suffers but there is no performance gained?
I'm trying to understand the advantages of lambda and MAF while I drive an old car, those parts are worn.
How come I have loss in fuel efficiency while there is no gain in performance?
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2002 Silverado 4.3l wiring question, MAF sensor and water temp sensor throwing intermittent codes
My truck had been throwing intermittent MAF codes for a month, P0102 "low or no voltage." I only noticed due to the rough idle and "stumbling" on acceleration. I finally got around to giving the MAF a ...
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Mass Flow Sensor missing
I've recently purchased a Volvo V70 I 2.4 (106kW, 1998, manual) and wanted to check the mass flow sensor for issues. But it appears that my car has none, even though I've seen them in all pictures and ...
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Does MAF has something to do with rough idle?
I am trying to solve my cars long issue in idles again.
Cleaning the ICV did the trick before but it keeps coming back and I don't know what else to check. Here's the link in my previous question.
...
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MAF Sensor Performance Code in cold weather
I have a 2011 Nissan Murano with a check engine light that comes on and off. It started once the weather started turning cold, however the check engine light will disappear shortly after I get my OBD ...
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Is there anyway a shade-tree mechanic can check MAF calibration?
When it comes to testing MAF sensor on my vehicle, the factory service manual just suggests two PASS/FAIL tests:
an out-of-circuit resistance reading at a particular ambient temperature
validating ...
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1986 Corvette - ECM code 33 & 36
My vintage 1986 Corvette convertible recently developed a stumble that progressed to a no-run condition. It comes and goes sometimes starting but in a few minutes I get a SES (Service Engine Soon) ...
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Does the air intake system in a VW CC 2010 go around the engine?
I am trying to visualize what the air intake system in my car looks like.
It's a turbocharged 2.0L VW engine.
As I understand it, the air intake is on the front right near the radiator and headlight....
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IAT reading higher than ambient temp. Is that normal?
My car's engine comes with a Bosch hot film airflow mass meter. The probe inside the sensor's body features both the actual airflow sensor and what looks like a thermistor. I'm telling you that ...
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2001 Nissan Xterra drivability
2001 Nissan Xterra SE, 3.3L V6, automatic, 2WD, towing package, 150k miles
Some history, perhaps useful:
I bought this vehicle from a friend a few months ago. Vehicle was in
good shape for its age. ...
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What kind of MAF sensor is this?
A Bosch MAF sensor from a 1994-1996 Volvo looks like this:
I have read about different types of these old sensors and they all mention a "wire", however I cannot see a wire in this sensor, just a ...
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Check engine light won't stay off
I've attempted to get my check engine light fixed a couple times and at each repair facility they've scanned the code and told me it was a bad oxygen sensor. I had the oxygen sensor replaced at both ...
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Nissan MAF Volts to Grams per Second Conversion?
So my 99 Nissan Almera GA16DE 1.6L ( Euro Sentra ) is only OBDI, and only provides a voltage PID for the MAF.
Anyone know of a conversion from volts to grams per second?
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Why do modern PCMs prefer MAP over MAF
Why do modern PCMs prefer to use pressure sensors to estimate the air charge going into an engine instead of air flow meters. Eg they typically use a MAP sensor and complex software to estimate air ...
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2002 Nissan Sentra XE (1.8) bogs down under heavy acceleration
This is my first time asking for help here so please bear with me.
As the title says, my 2002 Sentra XE bogs down when my try to accelerate hard. It's more noticeable from a stop, but seems to do ...
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p0104 MAF sensor
I'm having a P0104 error code, but there's no MAF sensor in my car (Focus mk2). There is a MAP sensor in it, but that should have another error code.
Any idea how this is possible ?
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'98 Subaru Legacy Outback -- does this sound like a broken MAF?
Starts fine, idles for a couple seconds, then stalls itself. No CEL the first time or two. Here's a video of the stall behavior.
I suspect the MAF because I was recently mucking around removing the ...
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Engine shudders when tachometer falls to idle RPM from around 2K RPM
We're talking about a 2005 Volvo S80 2.5T 5-cyl engine vehicle here. Back in late September was the first time I experienced this engine shudder/stutter behavior when the tachometer dial went from say ...
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open-loop vs closed loop
My car sprung a P0101 pending code recently, which shows up as a Mass or Volume Air Flow Sensor "A" Circuit Range/Performance on my BlueDriver OBDII scanner. I started to read this article SUCCESSFUL ...
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BMW 320D 2010 hesitating to accelerate while on highway for few seconds
Recently my 2010 BMW 320D had been playing up. Overall performance of the car has been fine. But this weekend it started to struggle to accelerate on the highway for few seconds and was fine ...
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Cleaned throttle body, MAP sensor suddenly dead
(Solstice)
So, I cleaned my throttle body with brake cleaner. I thought it was carb cleaner, but I am apparently illiterate. (Honestly, I'm not sure what the difference between them is.) I was very ...
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Is this a right MAF signal?
I've just bought this MAF sensor for the injection setup I'm going to build, and first I was struggling to figure out how to connect it. It's used for several BMW cars.(E38,E39,Z3) On the connector it ...
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1998 V6 Mustang -20+ LTFT on both banks
I just finished doing a bunch of work on my Mustang (replaced all gaskets down to head gaskets on engine, had the heads milled and a valve job done, replaced all the fuel injectors, new fuel injector, ...
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Anyone have experience with a faulty fuel press? Regulator?
I've been dealing with a car that starts and then suddenly dies. I replaced the MAF (Mass Air Flow) sensor with a new one, and now it stays on until I press the gas pedal. The throttle body is clean.
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Chevy 2007 Trailblazer Sputtering in the Morning. Code P0171 has come up in the past
For a little over a month, the P0171 (System too Lean) code has been coming up. My brother has cleaned the throttle and the MAF (Mass Air Flow) sensor. It then worked fine for a few weeks, then the ...
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Should you replace the MAF sensor housing when replacing the MAF sensor itself?
When I search for a MAF (mass air flow) sensor on a parts website, I see some that are sold with the housing and some without. A mechanic gave me a quote that correlates price-wise with the full ...
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1996 Ford E350 (5.8L) Mass Air Flow Sensor - where is it?
I can't find the MAF sensor on my 96 Ford E350. (Been googling for hours :))
In case a picture helps:
Like I said, I've been looking for quite a while, and I can't find anything. Thanks!
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How is it advantageous for fuel management to detect negative mass air flow?
Here is the flow-voltage mapping for the Bosch sensor utilized by my E39 M5.
I find it curious that readings below 0.9 V correspond to negative flows.
Questions
Is it possible that air can flow the ...
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What does the OBD error code P0100 mean?
What does the OBD error code P0100 mean?
I have an engine misfire with the check engine light on in my Nissan N16 Supper Saloon -1300cc - 2000 model year. The engine started to produce less power.
An ...
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Check engine lights came up after Air filter change?
Yesterday I changed air filters in my car (Nissan supper saloon N16 - model year 2000). After installation the check engine light came on when I started the engine and the engine seemed to be running ...
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Calculating AFR using injector flow rate and mass air flow
Is injector flow rate = Mass fuel flow?
If so then AFR = MAF/Injector flow rate. Can someone please confirm this?
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How can one calculate volumetric efficiency without a MAF sensor?
I am completely new in the field of OBD2 sensor;
I am looking for a method (or a formula) to calculate Volumetric Efficiency of:
Diesel Car
Petrol Car
which do not have a MAF sensor. Can anyone help ...
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What is the difference between a MAP and a MAF sensor
Generally a car uses either MAP or MAF to determine the air flow index the engine is getting and that older cars used to have MAP and newer ones often use MAF and cars like the Mitsubishi EVO uses ...
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