Question about Pontiac Cars & Trucks
I'm having trouble with my son-in-laws car, a 2003 Sunfire. I have checked the flow of gas to the feul injectors and they are fine. I have checcked to make sure that the sparks plugs are firing and they are. A friend of my says that he thinks that the Crankshaft Senor maybe the problem. So we bought one and need to find the location of the senor. This car is giving me a fit when it comes to finding the problem. If you have any ideas, I could use the HELP> Thanks Tom
The vehicle has spark ? What problem is the vehicle having ? If it had no spark i would say check the crankshaft position sensor .if it has spark most usually the crank sensor would be good .
Posted on Jun 02, 2017
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Posted on Jan 02, 2017
There are two crankshaft sensors located at the edge of the harmonic balancer. That's the large wheel coming out of the engine, passenger side, the wheel that powers the serpentine belt. One sensor is the crankshaft position sensor and the other is... I forget... crankshaft angle sensor or something. I replaced both on my car. I don't know wich one is your problem. When you buy a sensor, get the one with the mounting bracket already attached. They had problems with the sensor getting damaged from being adjusted wrong. Having the bracket already attached gives you the right adjustment.
Remove the serpentine belt. (It has a tensioner wheel. When that is moved, the belt becomes loose and can be removed.) With an 18 mm wrench, turn the crankshaft until one of the openings in the metal fin is at the sensor, giving a space where the sensor can be removed. One sensor is reachable from the top, but it is real hard to see. The other is reachable from underneath. My guess is, the lower one is you problem only because my lower one failed twice and the upper one only once. Your son has to crawl underneath, unhook the wire from the sensor, and unbolt the sensor mounting bracket. Put the new one in. Keep your fingers crossed.
Posted on Jun 02, 2009
Its an easy job if you can get the car up high - like on a ramp .just one plug and one bolt to do .
The sensor is behind the exhaust pipe in the clutch bell housing in line with the main oil filter .
Posted on Jul 05, 2010
Testimonial: "thnakyou thats very helpful. Do I need to remove the gearbox and the bell housing"
the crank possition sensor is a magnetic pick up sensor... it picks up the magnetic energy of other magnets on a cam lobe and tells the engines ignition system when to fire etc.
as with anything , CPS' wear out after a certain amount of cycles...
There is nothing you as a driver could do to extend the life of any electronic parts on your vehicle... they will wear as they were intended to ... and break ....
Posted on Sep 26, 2010
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