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Registered
Join Date: Oct 2008
Posts: 172
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Porsche 911s 1975
Hi , i have a problem with my revcounter, the needle seems to flick up and down on its own , does anybody know the cause of this , thanks,
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03-10-2010, 09:52 AM
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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Clean and adjust your points, then verify the grounds on the ignition circuit.
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Several BMWs |
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03-10-2010, 10:26 AM
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Posts: 172
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porsche 911s 1975
hi thanks for the repy. could it be a faulty coil causing the trouble ,
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03-10-2010, 10:31 AM
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90% of the time it's your points as dtw has pointed out. It could also be a cracked distributor cap or other things - but in general with these cars, it's most likely something really simple like the points. So go after the easy stuff first.
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Rex 1975 911s and 2012 Range Rover Sport HSE 1995 BMW R1100RS, 1948 Harley FL |
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03-10-2010, 10:36 AM
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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Yep, could be a coil going out, but check the easy/free/common stuff first. You can inspect the cap/rotor too, while you're cleaning & adjusting the points. I'll echo the above, 90% of time it is the points. One time I did discover a failed ground connection on the igntion harness, though.
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Several BMWs |
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03-10-2010, 10:52 AM
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Posts: 172
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porsche 911s 1975
OK. i have a new distributor cap and rotor on there , i also changed the ignition leads and fuel filter as ive been getting a jolty engine when pulling away, does this car have a condenser ,
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03-10-2010, 11:10 AM
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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Jolty near idle? Swinging tach?
Points! No condenser.
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Several BMWs |
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03-10-2010, 11:12 AM
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Join Date: Oct 2008
Posts: 172
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THE car always starts well and the engine idles well and revs up good, but when i pull away it sometimes is jolty but as i change up the gears and get into 4th gear it runs really well at higher speed
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03-10-2010, 11:21 AM
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1975 Porsche 911s
