Any ideas this car has been eating mafs since i put a cold air kit on it any ideas?
SOURCE: 2004 jetta tdi, has engine miss & lack of
Running rough?? If i took a guess I'd say there's a faulty injector. Does it smoke like hell ?? Does it also miss at idle?- If so get a line wrench and a rag handy. Start the car and while idling wrap the rag around the base of the fuel line connector on injector 1 and crack it just a bit until fuel comes out. It might spray, thus the rag. If the miss gets worse, that ain't the injector to blame. Continue with the other 3. If you crack a line and there is no or very little change in the miss then you found the guilty party.
On a long shot it could also be a stuck valve.
Did that get it?? It sounds like an issue other than MAF but.... get a multimeter and try probing the connecter to the MAF. When you find out what it is , please let me know. I'm curious
*The key must be on*
pin 1- ignore it
pin 2- gnd = 12-14v
pins 2- 3 = 12-14v
pin 4- gnd = 5v
pins 3- 4 = 5v
P0101 - Mass Air Flow Sensor (G70): Implausible Signal
Possible Symptoms
Possible Causes
Possible Solutions
SOURCE: Where is the lower MAF Sensor
The VW passat has only 1 MAF (massAirFlowSensor). If you follow the air intake, under the hood, from the top left of the grill...it goes to the air filter box. Depending on what the code says, You may need a new air filter if the sensor is not picking up enough air volume.
Follow up a bit futher and you will find some round plastic air duct, and in between these and the filter is a square MAF. It is attached to a piece of the duct, and the whole thing is replaced.
Many of these go bad because a dirty air filter will allow particles to clog it up. If you use a can of electrical cleaner on the little spring like sensor inside, you may just bring it back to life.
It is a very sensitive sensor, do not touch it with anything. A new one is around $150.
Good Luck!
Remove the ground battery cable from the negative terminal battery post. This prevents sparks, which can cause an fire, when metal tools make contact with the engine. Also, set your emergency brak engen.
Determine which type engine you have. The 1.8L awd 1.8L (Aww and Awp) and the 2.8L (Bdf) require slight variation in the replacement process.
Use a Phillips head screwdriver to remove the screws that hold the engine cover in place. Then lift off the cover.
Expose the Jetta ignition coil. On a 1.8L (AWD) engine, you need to remove the recirculating valve and the secondary air inlet valve and their mounting systems. For the 1.8L (Aww and Awp) engine, you take off the hex nut and vacuum reservoir. The 2.8L (Bdf) engine doesn't require the removal of additional components.
Unscrew the retainers securing the Jetta ignition coil.
Separate the old ignition coil from the cylinder head. On the 2.8L (Bdf) engine, use Puller T10095 to release the Jetta ignition coil. You may need to twist the ignition coil to break the seal between the parts
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