53:Crankshaft sensor: will the car with this bad and MAF unplugged? Our certified mechanics come to you ・Backed by 12-month, 12, 000-mile guarantee・Fair and transparent pricing. Bear in mind the car started and idled fine as I drove it into my shop to begin repairs. Crankshaft sensor might be failing, but could be also false reading caused by other issues IMHO. There is still no CEL/SES light on, so I don't know if these codes just weren't "really erased" or if they are part of the current issue. Until the O2 sensors warm up they can't get a reliable reading. If that was while cranking, you need to fix it. I'm little old school so I'll have to check into that. In your case, when unplugging the mass air flow sensor, your car's engine is bypassing the mass air flow sensor input into the ECU causing it not to have a reference point for air/fuel mixture. 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. Car won't run with maf plugged in 1. If the MAF is unplugged the ECM has to use presets and basically cross its fingers. If the MAF sensor is unplugged, the computer will not be able to properly adjust the air/fuel mixture, which could lead to engine damage. A mass airflow (MAF) sensor measures the amount of air entering the engine.
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11) Almost forgot one more point When I first cold started the engine (maf unplugged) when I plugged it back in the engine cuts off, however when engine is a little warm (like the gauge is just starting to move) it will keep running when plugged back in. Californina won't smog the car with the CEL on and now I'm stuck with a car I can't A: Sell as is. The problem turned out to be that dumb gasket on the oil filter housing. Yes, reset and then read again after running a little. Tried pumping gas while starting car, caused motor to sputter, buck and die. E4:o2 sens adaption limit cyl #4-6. 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. What Happens If You Disconnect Mass Air Flow Sensor. I guess it would make a decent boat anchor for a shrimp boat or something... In some cases, the vehicle might run even better if the mass airflow sensor is bad. F0:Misfire cyl #3--"". I am told this car has set a couple of years. Last but certainly not least the car came with a bent rear rrently being straightened at the shop.
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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. Your car has a lot of sensors, and this is just one that helps your car run properly. Car won't run with maf plugged in youtube. The basic purpose of the mass airflow sensor is to measure the amount of air that is going into the engine so your car can release the proper amount of gas into the engine, so the car is able to run correctly. If the car dies when you disconnect the mass airflow sensor, then that means it was working right and that your computer has issues.
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Replaced it, and still having issues. Car won't run with maf plugged in fire. Heck, I even went ahead and replaced the cooling fan with a direct MINI replacement. After the cleaning, they basically undid everything I had done and reassembled everything with new parts. I haven't see any other obvious damage yet. Another potential reason why your car only runs when the MAF is unplugged is that there is a problem with the air intake system.
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Can you test a mass airflow sensor by unplugging it? This could be something as simple as a dirty air filter or a leak in the intake hose. What would happen if MAF sensor was unplugged. As has been mentioned by driving without it you might get better gas mileage and if that is the case, then it is a sign that you should clean or replace your mass airflow sensor because it is giving false readings. If you let off the throttle, it falls on its face and bucks.
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Usual range that I've seen is 12-20 kg/h. It isn't able to use the tables programmed in it to guess the amount of fuel needed. Thanks to all in advance! 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. 99 Legacy won't run with MAF connected? - 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX. Some others can also be read such as TP (assuming throttle position here) it does change if gas is applied. 9) I let the engine get up to running temperature.... seems to idle a little rough then. With the maf unplugged, the car hauls ass.
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Okay then, maybe I am just now hearing it from the new bellows. If you have a car that only runs with the mass airflow (MAF) sensor unplugged, there are a few potential causes. I have found leaks with a spray bottle before though when I couldn't tell exactly where the noise was coming from. 98:precat o2 sens disconnected cyl #1-3. 27:Brake light switch---I'm painting the calipers from this. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. The MAF sensor measures the amount of air flowing into the engine and tells the engine computer how much fuel to inject. The noise seems to be coming from the IAC as I can feel the vibration when the IAC is touched. E36 328is ~210-220whp: Lots of Mods. They will be able to diagnose the problem and recommend the best course of action.
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I will definitely check where you mentioned earlier though I am new to BMW and ALL information is good to have. 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. Sometimes mass airflow sensors get shorted or stop working and need to be replaced. 7) Visual inspection nothing looks out of place. Now on the engine I can hear what sounds a little like a pc fan under the intake manifold when in the run position, Is that normal? When you reach operating temperature, the ECM switches to the O2 sensor readings, which give better control because the computer can analyze how the engine is actually using fuel and can alter fuel trims to optimize drivability and efficiency. The mass airflow sensor is a key sensor in your car. By letting the mass airflow sensor make the readings, it allows for the most accurate numbers if it is working properly. Anyone have any idea what could be going on? 6) Checked fuel pressure on rail.... measures 40 lb ( a little low but I don't know if that could cause my issue). Finally, there could be an issue with the engine computer. 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. The codes are as follows and in order: 01:Ing coil cyl#2---seems ok just listening.
The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. The car will cut off immediately if MAF plugged back in too soon after starting. Smoke tested for vacuum leaks (there were none) I have absolutely no idea what could be wrong, after the extensive amounts of diagnosis I'm at a standstill. Now I have the Peake Scanner and it shows some codes even though my China scanner was used to clear before. Again is that normal??? Kim Kardashian Doja Cat Iggy Azalea Anya Taylor-Joy Jamie Lee Curtis Natalie Portman Henry Cavill Millie Bobby Brown Tom Hiddleston Keanu Reeves. Why does my car only run when the MAF is unplugged? If your car is only running when the MAF is unplugged, it is important to have it checked out by a qualified mechanic. All in all, I new I had work to do. You have an engine check light on? I would honestly assume that the issue here is a massive vacuum leak and letting unmetered air in, making the MAF data be inaccurate. Additionally, driving without a mass airflow sensor can trigger the check engine light.
Whe you unplug the MAF, the system is forced to run an Alpha-N map. Please don't think I already now about issues which may be common to BMW.. In truth, unplugging the MAF makes the DME ignore most all sensors. If the sensor is dirty, it may not be able to accurately measure the amount of air flowing into the engine. However, doing so is not recommended for a few reasons. I will research some more on this. Technically drive with an unplugged mass airflow sensor. Read on to find out all you need to know about when you unplug your mass airflow sensor and if your car will stay running or not?
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