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Re: [tech]hall sensor...?



Mine does this, and has done it since it had 30k miles on it when I got it.

My tach acts like a combination tachometer and "Battery Health Meter".  When the Battery's not fully charged, the tach will jump up the scale as I crank, and fall back to normal after I start it.  The higher the tach goes, the more dead my battery is.  If it jumps immediately to 8000 when I turn the key to the "on" position, my battery will be discharged to the point where the car won't crank.

It often will bounce quickly at idle to 2000 and back if I touch the gas pedal enough to trip the fuel cutoff microswitch.  Again, if the battery is brand new and fully charged, it doesn't do it.  Within 8 months, it starts up again.  (I eat a battery a year for no apparent reason).

Jason



At 10:53 PM 1/16/01 , chris jevens wrote:
Hwody rocco list... I wanted to know if anyone has ever had the tach peg the scales while during start-up? I start my car, and the tach will sit at 5-6k. All awhile the motor runs like ass at about 800-1k... any guesses? I was wondering if it could be the dist w/the hall... I don';t know...
 
chris
87 16v rocco


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1987 Scirocco 16v
1988 Mercedes 190E Sport Euro


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