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Re: 1989 900 sedan non-turbo electrical issue
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Posted by Lane (more from Lane) on Wed, 29 Oct 2025 06:14:12 Share Post by Email
In Reply to: Re: 1989 900 sedan non-turbo electrical issue, ursusskandia [Profile/Gallery] , Mon, 20 Oct 2025 06:03:03
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So an update:

Car started at mechanics with old CPS then died a few minutes later. Seems to be a common sign with failing CPS I think? We ordered the Honeywell 4AV19F sensor and installed it and now the car won’t start at all. Mechanic said he is reading 12v at the sensor when it’s supposed to be 5v? Any thoughts? He’s going to put the oscilloscope on it next to see what’s happening at the sensor but thought you guys might have some good ideas. Thanks.

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