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Topic: Rev counter erractic on Ultima 2.9 12v (Read 1266 times) |
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samg
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I love YaBB 1G - SP1!
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Rev counter erractic on Ultima 2.9 12v
« on: May 15th, 2007, 4:44pm » |
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Hi,
The rev counter on my 2.9 12v Ultima auto Estate is waving up and down even on tick over.
Where is the sensor located?
Regards,
Sam
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Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6284
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #1 on: May 15th, 2007, 5:41pm » |
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It takes the pulse from the distributor, the wiring diagrams are here Wiring Diagrams
Even though it says sierra ... It IS for the Scorpio.
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samg
Newbie
I love YaBB 1G - SP1!
Posts: 17
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #2 on: May 16th, 2007, 4:32pm » |
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Hi Dave,
Have checked link unfortunately, I can not see any details for rev counter.
is the sensor a seperate module connected to distributor? or could it be the rev counter itself.
regards,
Sam
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #3 on: May 16th, 2007, 6:20pm » |
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Hi,
There is no "sensor". It takes a pulse from the LT side of the ignition.
IMHO provided your engine is running ok then it is more likely that your rev counter is faulty. 
Regards Dave.
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Dave "The 'ol Bear" ex Footer !
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samg
Newbie
I love YaBB 1G - SP1!
Posts: 17
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #4 on: May 16th, 2007, 8:24pm » |
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Many thanks Dave,
The engine is running very sweet after oil change, new oil filter, air filter, new spark plugs and a bottle of Cataclean in the fuel tank, what a difference the Cataclean made to the c o readings.
As you say, it must be the rev counter, I will try to pickup one from local breakers yard,
Thanks again,
Sam
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Snoopy
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #5 on: May 17th, 2007, 8:58am » |
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You will have to get the WHOLE unit the Rev counter is NOT a seperate item.
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samg
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Re: Rev counter erractic on Ultima 2.9 12v
« Reply #6 on: May 17th, 2007, 9:05am » |
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Ok thanks Dave,
Regards,
Sam
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