Tachometer signal source? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Tachometer signal source?
Posted by Erik Karlsson [Email] (more from Erik Karlsson) on Fri, 2 May 2008 06:41:58
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1997 900s 5-speed (distributor/coil ignition)
Does anyone know where along the ignition path the tachometer reads its signal? I'm having the engine suddenly stop running on the highway - it happens so smoothly, I often don't realize it until I notice the car slowing and the tach shows no revs. Since the car is still in gear, the recently replaced ignition key module is on, and the engine is turning over, but I have no tach reading - and since most of my coil-based cars in the past have read the tach value off the coil, I'm thinking I may be losing a coil.
I also have a Crank Position Sensor on-order since my car is throwing codes for it. From reading on the board here, it appears the CPS only comes into play on startup...but does it also have a play in the general running of the car?
All the best!
--Erik
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