Question about Cars & Trucks
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
The Intake Air Temperature (IAT) sensor determines the air temperature
inside the intake manifold. Resistance changes in response to the
ambient air temperature. The sensor has a negative temperature
coefficient. As the temperature of the sensor rises the resistance
across the sensor decreases. This provides a signal to the PCM
indicating the temperature of the incoming air charge. This sensor helps
the PCM to determine spark timing and air/fuel ratio. Information from
this sensor is added to the pressure sensor information to calculate the
air mass being sent to the cylinders. The IAT is a two wire sensor, a
5-volt reference signal is sent to the sensor and the signal return is
based upon the change in the measured resistance due to temperature.
Fig. 1: The IAT sensor is located in the air cleaner outlet tube-2.2L engine and 2.4L engine
Posted on Apr 11, 2010
This is an all too common problem with the Cavalier and other GM J-body cars. Usually it is because of the crankshaft position sensor or the harness going between it and the DIS (aka ignition module). Without the DIS seeing a signal from the crank sensor, it doesn't know when to trigger fuel and spark.
Sometimes this can also be caused by a faulty ignition switch. The switch will allow you to "crank" the car, but it doesn't make the proper connections for the ignition system, so the car never actually runs.
The previously indicated oil pressure switch could also be causing the problem, but if you hear your fuel pump run then it's OK.
Hopefully this helps. If not, your Cavalier is as messed up as mine and probably not worth fixing.
Posted on Feb 14, 2011
Tips for a great answer:
Nov 11, 2014 | 2004 Chevrolet Cavalier
Oct 22, 2014 | 1991 Chevrolet Cavalier
Aug 13, 2011 | 2004 Chevrolet Cavalier
Feb 04, 2011 | 1991 Chevrolet Cavalier
Nov 17, 2010 | 1991 Chevrolet Cavalier
Feb 16, 2010 | Chevrolet Cavalier Cars & Trucks
Apr 24, 2009 | 1999 Dodge Intrepid
Jan 24, 2009 | 1991 Chevrolet Cavalier
Nov 27, 2008 | 1991 Chevrolet Cavalier
90 people viewed this question
Usually answered in minutes!