MAF sensor

[naveedh]

salaam brothers. i have replaced the MAF sensor in my 2003 galant twice now. the car runs fine when it is unplugged and does not stall at all. with the MAF sensor plugged in however, it sputters and tries to keep the idle up, although it stalls only once the rpm falls below 1000. i was told by the people at the workshop that there are no vaccumm leaks or anything. the battery is good, the alternator is almost brand-new and i recently changed the EGR. i might be wrong but i dont think that another bad sensor can cause the MAF sensor not to work when plugged in. or can it? if so then which one?

[rathodg]

If your vehicle runs better when the mass air flow sensor is unhooked, then chances are that the signal from the sensor is bad (could be for a variety of reasons) or you just have an air or a vacuum leak. Check the intake air snorkel for any damage and replace it if needed.

[noris]

@naveed

Two other sensors work in conjunction with the MAF. The Coolant Temperature Sensor and the Manifold Absolute Pressure Sensor. You can research about these sensors and find a lot of information on them.

[amjats]

According to my experience, if the engine is not getting as much air as the MAF thinks it is, then it is probably a vacuum problem. See if the problem lies here and trust me ... im experienced here

[dubaicardude]

These sensors are designed to determine the amount of air being taken into the engine and adjust the fuel mixture accordingly to optimize power and efficiency. If the sensor goes bad it can cause all sorts of problems from check engine lights to knocking and pinging. Most airflow sensors are designed to work within certain parameters but if you have modified your engine the increased airflow can exceed the limits of the sensor and cause running issues. In addition, the factory mass airflow sensors can also be restrictive to airflow and hinder power in certain high-performance applications.

[franco]

check da wiring. cud b a short circuit.

[alexr]

Typically these sensors fail due to exposure to the under hood heat from engine operation or if debris collects on the sensor element.