Re: [DML] RPM counter problem

[Chris Almy <chris.almy@xxxxxxxxxxx>]

I had a similar problem too when my cooling fans would turn on. My RPM 
would jump by about 1K when both were on. When I rewired that circuit to 
get power directly from the battery and not the main harness, the problem 
went away. In your case, cleaning the grounds and main power terminals will 
probably fix it. Remove the wall behind the rear shelf. There is the main 
power terminal and ground for most of the car behind there. Clean both of 
these and the other ends inside the engine compartment. While you are at 
it, it's best to clean the other major ground and positive points between 
there and the battery.

Chris
VIN 4099

At 06:08 PM 3/1/2007 +0000, you wrote:
>Hi All,
>
>I am looking for some advise on my rev counter problem..
>
>When I run the car the rev counter works correctly...
>
>I then switch on the air conditioning switch to either 'max' or
>heater and it still works ok..
>
>However as soon as I then switch on the fan the counter leaps up by
>a couple of thousand RPM (The engine does not actually change by
>this amount) and the counter then leaps about with a mind of its
>own !!
>
>Obviously some electrical problem but not sure where to start ??
>
>Regards
>
>john.


[Non-text portions of this message have been removed]



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