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Sounds like a crank shaft position sensor. Posted by SWEDECAR [Email]  (#112)  [Profile/Gallery]
(more from SWEDECAR) on Tue, 6 Apr 2004 20:29:43
In Reply to: '99 9-5 V6 won't start, PeterJay, Tue, 6 Apr 2004 18:24:38 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Interesting lately is that this symptoms/question have started to pop up over several boards.
The CKP sensor gets heat sensitive when going bad, that's why many times the car runs perfect over to the store but refuses to start after sitting in the parking lot for 10-15 minutes.
During those 10-15 minutes the engine heat creeps into the sensor, killing the electronics.
After another 30 min the engine heat slowly goes away and the sensor is back to running order.
This can be repeated many times and one thing to do is to open the hood and let as much cold air in as possible to speed up the cooling down process.
It can be difficult for a shop to find the culprit since the sensor show perfect values when cold and the engine is running.
What they have to do is to leave the car running with hood closed (preferably out in the sun on hot asphalt) to make the engine as hot as possible.
As soon as the engine dies they can measure the resistance over pin 1 and 2 of the CKP sensor. The nominell value should be 860 Ohm at room temperature +- 90 Ohm.
If they see a reading of several thousands or even mega Ohm, the sensor is bad.
With the hood open, they can also see the Ohm reading slowly drop because of the cooling down effect and when it gets closer to the nominell value (860 Ohm)they can plug the sensor back in and the car will start again.
I had a car in some month ago where I tried this 5 times in a row, it was kind of interesting to be able to tell exactly when the car would start again.
Anders
posted by 66.229.13...
, Tue, 6 Apr 2004 20:29:43 <-- Viewing This Message, Thu, 8 Apr 2004 09:47:15
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