Question about 1983 Porsche 928

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When it starts it pops and sputters then dies then unplug maf and cranks

Changed mass airflow sensor and it still does same thing looking for alt repair before it gets to expensive

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Check for a vac leak, first thing i would try is checking for a bad ECM... let me know how that goes....

Posted on Dec 06, 2012

  • cody wacom Dec 06, 2012

    check for a vac leak, first thing i would try is checking for a bad ECM... let me know how that goes....

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SOURCE: 1998 boxster

check vacumm leak or fuel pressure

Posted on Aug 04, 2010

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I changed my spark plugs and cleaned my mass airflow sensor with maf cleaner. The truck didn't want to start but it finally did. When if did it had a sulfur smell but went away. The truck wouldn't...


When you cleaned your maf sensor did you disconnect your negative battery cable. If you cleaned the maf senor without disconnecting the battery cable there is a chance that you shorted out the sensor. Try unplugging the sensor and see if the truck runs any different. If it does not run any different with the maf sensor unplugged then you will know you found your problem. I hope this helps you out, and good luck

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The famous MAF (mass airflow sensor) yours is a vane movement type this is the famous intermittent failure, here is the good new just adjust it. you dont have to relace it, the way to do it is to open the blaack cover and tension down the spring, (just a tad) this is the one of the solution. 300 zx has a proor ground problem to the MAF the fix and the solution is to get the MAF gound sensor and make a addition ground bolt it to the intake and your done. On the MAF sensor it the 3rd wire MAF ground NOT THE MAF ECM NEGATIVE connection

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HOW TO INSTALL MASS AIR FLOW SENSOR


The Sentra is known to blow mass airflow sensors. If you bought an aftermarket sensor and it says to reprogram the computer you are pretty much out of luck. If it were me I would read the instructions again as it probably means that you have to disconnect the battery for five minutes and let the computer learn the new mass airflow sensor.

The mass airflow sensor, or MAF sensor, measures the amount of air flowing into the engine through the air intake. The sensor on your Nissan Sentra is located in the air intake tubing that runs from the filter to the fuel injection system. If your Sentra is idling rough, has problems starting and frequently stalls during normal driving, it is likely that the MAF sensor is failing and needs to be replaced.

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Things You'll Need:
  • Socket wrench and socket set Screwdrivers (Philips and slotted) New MAF sensor
Instructions
  1. Open the hood and locate the air box. It should be on the passenger side of the engine bay near the front of the vehicle. It will be a plastic, box-shaped object with a large plastic pipe running to the back of the engine.
  2. Examine the new MAF sensor. You'll be looking for this component in the air box.
  3. Remove the air box cover and pull the air filter out.
  4. Loosen the band clamps on the intake tubing with a screwdriver and pull the intake tubing off of the air box.
  5. Unplug the electrical connection to the MAF sensor and pull the MAF sensor out of the air tube assembly.
  6. Install the new mass airflow sensor and put the air box assembly back together. Installation is the reverse of removal.

Hope this help to solve your problem (remember comment and rated this).

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1 Answer

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i'm guessing that it cranks, just won't start. if it won't crank i would have a different fix. check mass airflow and manifold absolute pressure sensors (maf and map). make sure they have good power and ground connections and determine that sensors are operating. hard to do with no start right? pretty much make sure they get 12 volts and then check for continuity between the ground connection and a known ground, like the neg post on battery. then one at a time unplug the sensor and try to start engine. if it starts with a sensor unplugged, probably a bad sensor.

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