Assuming you have a car that is running only when the mass airflow (MAF) sensor is unplugged, there are a few things that could be going on. I went to start the car and it fired up and I guess it decided it didn't appreciate what had just transpired and then promptly died while making this odd whistling noise. Check rubber and plastic vacuum hoses.
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Okay, a little backstory first. E4:o2 sens adaption limit cyl #4-6. I rechecked everything. The mass airflow sensor is a key sensor in your car. We have a guide here on how to clean it, but cleaning your mass airflow sensor is really easy and can help it start working cleaning the mass airflow sensor does not fix the issues that it was having, then it is time to replace it. If you want a technical definition of how a mass airflow sensor works, then you can take a look at the article we have here, but for this article, we will just cover the basic function of the mass airflow sensor. Anyone have any idea what could be going on? Car won't run with maf plugged in inglese. I guess this stupid car also requires Perrier Sparkling windshield washer fluid and a spritz of Ode de Toilet on the cabin air filter when replaced because apparently this car is higher maintenance than my ex-wife) I changed the oil, made sure I had everything hooked back up correctly using diagrams I made and photos I took before the teardown... MAF sensors can be tested by unplugging them and measuring the voltage drop across the sensor. If you let off the throttle, it falls on its face and bucks. So as you can see disconnecting the mass airflow sensor is actually a good way to test a variety of things.
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Any suggestions would be appreciated. Replaced it, and still having issues. I was driving my R56 one day and I got an engine temp warning. NFL NBA Megan Anderson Atlanta Hawks Los Angeles Lakers Boston Celtics Arsenal F. C. Philadelphia 76ers Premier League UFC. In this article, we will look at what happens when you disconnect the mass airflow sensor. Additionally, unplugging the MAF sensor can cause the engine to run richer because it isn't getting accurate information about the amount of air flowing into the engine. If the sensor is working properly, the voltage drop should be within a certain range. Car won't run with maf plugged in 2019. You know unplugging your mass airflow sensor is a good way to test it and other sensors, but you also know that driving a bunch with it unplugged isn't good because it gives more accurate readings than just your computer guessing at the airflow. Usual range that I've seen is 12-20 kg/h. A leak in the air intake system can also cause the MAF sensor to give false readings, which can cause the engine to run rich. Your car has a lot of sensors, and this is just one that helps your car run properly. Buttoned every thing up, refilled and bled the coolant system... (side note, I think it's ridiculous to have to use distilled water with the BMW coolant! Heck, I even went ahead and replaced the cooling fan with a direct MINI replacement. This can be fixed by cleaning the sensor with a special cleaning solution.
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If there is a leak in the air intake system, it can cause the engine to run lean. 53:Crankshaft sensor: will the car with this bad and MAF unplugged? Car Only Runs With MAF Unplugged? [Explained. So while you can technically drive with an unplugged mass airflow sensor, it's not something we would recommend. On top of testing the mass airflow sensor by disconnecting it, you can also test some of your vehicles other sensors by disconnecting the mass airflow sensor. I can get some readings live on this obd II scanner and the maf does read when plugged in (what should it read?
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But of course that is not a good diagnostic test, as Randy pointed out. This is what causes the hesitation or loss of power you describe. My car is not starting when the MAF sensor is plugged in. Codes are p1606, p1122, and p0102 (pulled when maf was unplugged). However, doing so is not recommended for a few reasons. There was a guy who made a cheap crappy smoke machine with cigars, a small air pump (for a nebulizer) and some hoses. The car will cut off immediately if MAF plugged back in too soon after starting.
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So, I am left with the fact that I would have to place the car in "non-op" status at the DMV. Some others can also be read such as TP (assuming throttle position here) it does change if gas is applied. 'Usually' any MAF reading over 20gk/h at idle is going to be pointing to the maf. Unplugged MAF, now car won't start - Maintenance/Repairs. Before going into detail on what will happen when you disconnect the mass airflow sensor it is important to understand what it actually does. DE:Coolant temp too low for closed loop operation.
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This is not true, and lead sto many expensive mafs being replaced needlessly. Why does my car only run when the MAF is unplugged? Cliff notes: -car runs fine with maf unplugged. 1999 S52 Estoril M Coupe. It's not necessarily bad to drive a car with the MAF unplugged, but it's not ideal either. Last edited by Artofkicking; 03-24-2017 at 10:50 PM. Kept the engine turning for a good 10 seconds, gave it some gas and slowly came to life. 2003 VW Jetta TDI Manual 47-50mpg. This can cause the engine to run lean (too much air and not enough fuel) or rich (too much fuel and not enough air). Car won't run with maf plugged in without. That is because if the sensor is bad or giving a wrong reading, then the cars guess might be closer to the actual amount of air that the engine is getting giving you a more accurate fuel mixture. I would suggest having a professional, such as one from YourMechanic, come to your home to diagnose and replace the mass air flow sensor. I would honestly assume that the issue here is a massive vacuum leak and letting unmetered air in, making the MAF data be inaccurate. Look, this car is 10 years old and now we're bordering on repair prices that outweigh the current value of the damned thing. This can also cause the engine to struggle to idle for the same reason.
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27:Brake light switch---I'm painting the calipers from this. So, now you know what happens when you disconnect the mass airflow sensor. I haven't see any other obvious damage yet. Additionally, driving without a mass airflow sensor can trigger the check engine light. The old ones were badly split. I'm guessing the seat sensor. EE:Misfire cyl #1--I have heard ignition misfire once warmed unplugged. E36 328is ~210-220whp: Lots of Mods. Once you have driven your car enough to test the mass airflow sensor it is a good idea to plug it back in or replace it after you are done testing. Can you test a mass airflow sensor by unplugging it? The most likely culprit is a faulty MAF sensor, but it could also be an issue with the fuel injectors, fuel pump, or ignition system. If your car is only running when the MAF is unplugged, it is important to have it checked out by a qualified mechanic.
It isn't able to use the tables programmed in it to guess the amount of fuel needed. If you have a car that only runs with the mass airflow (MAF) sensor unplugged, there are a few potential causes. Kim Kardashian Doja Cat Iggy Azalea Anya Taylor-Joy Jamie Lee Curtis Natalie Portman Henry Cavill Millie Bobby Brown Tom Hiddleston Keanu Reeves. That is because even though your car can run without the mass airflow sensor, you shouldn't do it for long periods. There is no one magic number, if there was the maf wouldn't be needed. Is it bad to drive a car with the MAF unplugged? On top of knowing what happens though when you disconnect it, you also know why you might want to disconnect it and also when to disconnect it. It measures the amount of air flowing into the engine so that the engine can be properly fuelled. I immediately stopped the car and had it towed home. The article is going to be discussing how to troubleshoot a car that will only run with the mass airflow sensor unplugged. A mass airflow sensor (MAF) is a key component of an engine's electronic control system. 10) No new codes have shown up.
Technically drive with an unplugged mass airflow sensor. Sometimes mass airflow sensors get shorted or stop working and need to be replaced. The car was parked for 2 years after the previous owner evidently took a wild rim bent on the inside and rear sway bar was popped out of links. If the computer is not able to properly adjust the air/fuel mixture, it could cause the engine to run only when the MAF sensor is unplugged. Has brand new maf sensor.
Car ran perfectly healthy until I replaced coolant temp sensor, tried putting old sensor back in, did not help. P. S. I forgot to mention there is a noticable humming/buzzing type sound that I don't remember hearing before the new fuel pump was installed. Edited April 3, 2018 by Multisurface-Legacy 1 Quote Link to comment Share on other sites More sharing options... Now Pretty much the same situation. You know that your car will start and keep running even with the mass airflow sensor unplugged. 5) Car still doesn't start/run. P1250 has as much crap floating around as unplugging the maf. If you're not sure what's causing the problem, take your car to a qualified mechanic for diagnosis and repair.
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