2002 Mitsubishi Galant crankshaft position sensor

Tiny
LYSSASHELTON
  • MEMBER
  • 2002 MITSUBISHI GALANT
2002 Mitsubishi Galant

we just replaced the crankshaft position sensor and now the car wont start. It acts like its out of time but we didnt mess with the timing belt. What else could be wrong with the car?
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Monday, March 15th, 2010 AT 6:14 PM

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Tiny
CARADIODOC
  • EXPERT
Why did you replace the sensor? Did this problem occur before replacing it? Was this a new or used sensor? If used, did you install the paper spacer to set the air gap?

Caradiodoc
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Monday, March 15th, 2010 AT 6:25 PM
Tiny
LYSSASHELTON
  • MEMBER
We were told the sensor was bad. It was a new sensor. We never had a problem with the car not wanting to start before
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Monday, March 15th, 2010 AT 6:49 PM
Tiny
CARADIODOC
  • EXPERT
If the sensor had failed earlier, the engine would not start, or would stall while driving. If neither of those were occurring, there would be no reason to say it was bad. Now that it has been replaced, be sure it is pushed in as far as it will go, check for loose / stretched pins in the connector, and be sure none of the connector pins are pushed out of the connector body.

You might also try putting the old sensor back in.

Caradiodoc
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Monday, March 15th, 2010 AT 7:12 PM
Tiny
LYSSASHELTON
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We took it to a shop and they ran some test and said the sensor was bad. Its connected right but the car still wont start. Does the computer need to be reset in order for it to read the new sensor?
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Monday, March 15th, 2010 AT 7:27 PM
Tiny
CARADIODOC
  • EXPERT
Back up a minute. Why did you originally take it to the shop? Was it running ok then?
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Monday, March 15th, 2010 AT 9:04 PM
Tiny
LYSSASHELTON
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It was getting hard to start so we took it to the shop
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Monday, March 15th, 2010 AT 9:47 PM
Tiny
CARADIODOC
  • EXPERT
Ok. A lot of different symptoms fall under "hard to start", but based on your mechanic's findings, the crankshaft position sensor could be one of the potential causes. They can be intermittent, and often fail when they become hot from engine heat.

The Engine Computer will detect the loss of signal from the crankshaft position sensor and set a diagnostic fault code in its memory. That is most likely how your mechanic was able to identify the problem even if the engine was running at the time.

Now the question is, ... Is there is different, second problem or is the problem related to the new sensor? If the hard starting acts exactly like before, the new sensor is most likely working, and there is a different problem. If the problem is worse / different than before, look more closely at the new sensor.

The air gap is critical for this sensor. The new one had either a small plastic rib molded on the end, or a paper spacer stuck on the end. The paper spacer will slide off the first time the engine starts. Its job is done. The plastic rib will wear off when the engine is started. To reuse it, the remaining part of the rib must be sliced off, then a paper spacer applied before it is reinstalled.

To check the operation of the sensor, use a cheap digital voltmeter to measure the voltage on the three wires. One must have either 5.0 or 8.0 volts when the ignition switch is turned to "run". The ground wire will have around 0.2 volts. The signal wire should vary from near 0 volts to around 5 volts as the engine is turned. If it appears to be working properly, look at the timing belt to be sure it hasn't jumped a tooth. One tooth off can make the engine difficult to start and have poor performance.

Caradiodoc
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Monday, March 15th, 2010 AT 11:14 PM
Tiny
KATIEN2
  • MEMBER
I have the same problem with my 2002 mitsubishi galant. I had to have the crankshaft position sensor replaced do to the timing belt breaking while driving. Now the car wont get a fire and we called the dealership they said it needsto be adjusted. How do you adjust it?
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Monday, November 7th, 2011 AT 3:02 AM
Tiny
RIVERMIKERAT
  • MEMBER
The crankshaft position sensor katien? Read the post above yours.
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Monday, January 23rd, 2012 AT 8:16 AM

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