Question about 1990 Saab 900 Hatchback
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Posted on Jan 02, 2017
You could try tapping the starter and/or having it checked by a mechanic. If the vehicle is starting once in a while, have a mechanic check the Crank Shaft Position Sensor located on the Intake Manifold under an aluminum bracket. The wire to the sensor leads towards the throttle body. the connector at the throttle body is blue. This sensor is notorious for giving out gradually. If this is the problem, seriously replace it as the vehicle could die when driving (i've heard, but don't quote me on that). I owned a 2001 9-3 turbo and the same thing would happen until it no longer cranked. I replaced it when i researched the issue on the internet. The car turned on as soon as i replaced it 8) and did not have the same problem again.
Posted on Apr 09, 2009
Your right on. Its most likely the altenator. Chances are the belt is sliping because the pully bearing is bad. Of course this all means that you are running off the battery and it is getting low. You will get stuck when you can least afford to. You must remove the altenator and replace. Oh one last thing it could very well be your water pump pully bearing. So remove fan belt and spin with your hand, if you feel resistance thats it, so remove fan belt and check before you start replacing components. Good luck
Posted on Jun 05, 2009
The switch needs to be replaced and it requires some special tools if it's in the steering column. If it's on the floor any shade tree mechanic can do it.
Posted on Jun 09, 2009
Mike, From your description of the problem, and given that the car was, prior to this attempted start, working properly, it soinds like you are not getting enough power to your starter solenoid to fully engage, thus the click. Start by checking your connections at the battery, make sure they are clean and tight, I would suggest you disconnect and clean thououghly with a wire terminal brush. Water and baking soda will help dissipate the acid build up. You may then spray the connections with a contact spray, (from your local auto parts store), then reconnect. Also if you think the battery is weak, you could try a boost when you attempt to re-crank. Your connection at the solenoid should also be checked and cleaned, although the problem is likely at the battery. Remember, it takes a lot more amps to engage the starter and spin your engine, than to turn on the lights and blow your horn. If this works, you should have your charging system checked for output..usually free at advance or autozone. The corrosion at the terminals works both ways, not only can it keep your car from cranking, it can impede charging of your battery as well. Hope this is helpful.
Posted on Jun 21, 2009
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