Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> rev counter flickers
        
(Message started by: stuarte on Apr 16^th, 2010, 4:48pm)

Title: rev counter flickers
Post by stuarte on Apr 16^th, 2010, 4:48pm

when i start scorpio, it doesnt register on rev counter for a couple of mins unless i rev it gently, and then it flickers about like mad, after 2 mins it shows 1000 revs on its own, when i drive and i kick down it fluctuates madly before it settles. any ideas.

Title: Re: rev counter flickers
Post by tonyboy on Apr 16^th, 2010, 5:27pm

If you was having trouble with your alarm aswell it could well be the battery............

Title: Re: rev counter flickers
Post by stuarte on Apr 16^th, 2010, 5:58pm

not sure, battery never got flat turns over car with ease,does the coil produce signals to the rev counter. its not the situation where speedo and rev counter fly right around on ignition, just seems to flicker up and down like its unsure where to rest when driving normally

Title: Re: rev counter flickers
Post by Jonnycab on Apr 16^th, 2010, 6:22pm

If it's the 2.9 12V then the rev counter works from the alternator, if it's 2.0, 2.3 or cossie then it works from the EDIS module.

Also, check that the small lead on the battery negative is on nice & tight. This can also cause the rev counter to go loopy....may also cause alarm problems :)

Title: Re: rev counter flickers
Post by stuarte on Apr 16^th, 2010, 6:43pm

i checked , nut was very tight, althought terminals seems as if the connectors havent been moved in months, anyway i tightened even more which was hardly any, started car, it showed 1000 rpm right away, but when reving it seems to be slow to respond and jerky

Title: Re: rev counter flickers
Post by Mottsy on Apr 17^th, 2010, 7:33pm

My 2.9 12v had this problem when I first got it. The garage replaced the diodes in the alternator and fixed it. (I think this is basically the bushes).