Question about Volkswagen Jetta
I know notes I was losing power wen I stepped on the gas so I changed the mass flow sensor & its still **** it I just don't know what it could be no one ells dose
CHECK LIGHT ON,,,,,,,,,U SHOULD CHECK FOR LOSS OF TURBOS PRESSURE FIRST..IF U HAVE ONE U CAN HEAR A HISSING SOUND WHEN ACCELERATING....U MIGHT NEED TO CHECK THE FUEL FILTER AND FUEL PRESSURE...U MUST HAVE 3.5 BARS ....
Posted on Apr 22, 2014
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Posted on Jan 02, 2017
THAT LEAK IS UN-METERED AIR ENTERING THE ENGINE, FIX IT AND RETEST SYSTEM. P103 IS A MAF CODE. A MAF MEASURES THE AIR ENTERING THE ENGINE, AND BASED THAT AND ON OTHER DATA THE PCM DECIDES THE AMOUNT OF FUEL TO INJECT.
Posted on Aug 29, 2008
It's should be a simple remove and replace. Just make sure the engine is off. Also do not touch any of the filament wires on the sensor, just the plastic housing. Also after you install it drive the car for a little while (city speeds, cruising speeds and inbetween). That way the computer will be able to readjust its setting since it is a new sensor.
Posted on Apr 02, 2009
It’s located on the driver’s side of the engine on top /side of the head.. midway.. I don’t think you need to remove the engine cover to see it.. if it is the correct one it will have a dark green top.. the bad version has a black top… but they can all go out to lunch on you if old enough.
To replace.. make sure the car is cool..
You need a hood tool.. or small pair of pliers to remove the retaining clip that holds it in place.
Place a rag under and around it to catch the coolant.. you will lose less than a half a cup.. if that.
Pull the retaining clip back toward you.. try not to drop it.. (another good reason for the rag)
Wiggle the sensor.. pop it out.. and replace with the new green top one make sure you clean the area well.. and when you reinstall the new one that the c clip goes back on straight or it will leak.
Once you see the part out of the box.. you will understand how it works
Start the car.. check for leaks.. run until warm with the heater on.. top up the coolant overflow bottle with distilled water.. (if more than a half a cup.. you should mix the proper anti freeze and distilled water and then top up with that)
Posted on May 06, 2009
I had a problem on my Nissan Xterra 2000. Symptons sound similar. In my case, it ran fine for a while and then suddenly the engine starts to stumble and lose output. At one point it did not even have enough HP to move. Irregular idling too. Thought it was water in my fuel. Bought water remover from the store and added to gas tank. Problem did not go away. Instead, "Service Engine Soon" light came on. Had to have it towed to the dealer as there was no way the engine could keep up with traffic. Dealer replaced the "Crank Position Sensor" today. Parts $33.00, Labor: $300 (about 3 hrs worth of work). Seems to work fine now but I will wait and see. Dealer also stated that Distributor bearing appears to be noisy and will need to be replaced sooner or later. I will wait for it to go before I fix that.
Posted on May 27, 2009
If the mass flow sensor was bad, the check engine light should of came on giving off an engine code. To remove the mass flow, disconnect battery neg cable, then pull of the wire harness and pull out mass. You will probably have to remove the air intake hose.
Posted on Jul 03, 2009
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