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Radio low rpm intermittent...alternator problem?
Anyone else experience this? Below 1000-1100 rpm's the radio will cut in and out...adjusting the idle with the hand throttle back up a few hundred always does the trick. It may be more pronounced before the car has fully warmed up (and hence battery not fully re-charged). Anyone?
Ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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03-11-2003, 05:37 AM
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bump
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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03-11-2003, 04:00 PM
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Join Date: Nov 2002
Location: gatlinburg tn
Posts: 752
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stick a meter on the fuse block and see what voltage you have at idle. you could just have a short in the radio or the voltage regulator might be stuck on the high speed shunts.
check the voltage and post.
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72 911t grey/black mine 74 914 2.0 black/ tan hers 02 g500 black/black womanproof 01 f250 psd dirty the mule 60 correct craft starflite cool 69 correct craft torino hauls butt 72 correct craft ski nautique fun 66 vw 1500s will finish someday |
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03-11-2003, 04:09 PM
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thanks, tryan
i'll get a meter on it tomorrow and check. the reg. is only 4 or 5 months old...what do you mean by stuck on the high speed shunts? you just knew i'd ask! is this a common reg. failure point? i'll expect to see battery voltage before start and 13.5-14 running with alternator online. ryan
__________________
To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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03-11-2003, 04:16 PM
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Join Date: Nov 2002
Location: gatlinburg tn
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the voltage is regulated by how much current is sent to the field of the alt. at low engine speed , more current is required to develop 13-14 volts. when your screaming at 6000 rpm the field current is shunted to a couple resistors at the base of the regulator. ie it takes less field current to produce the same voltage because the engine/alt is spinning faster.
is the idiot light comming on? dim lights?( i don't drive the pcars at night to often) aftermarket/digital radio? it should work unless your getting down around 10 volts.
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72 911t grey/black mine 74 914 2.0 black/ tan hers 02 g500 black/black womanproof 01 f250 psd dirty the mule 60 correct craft starflite cool 69 correct craft torino hauls butt 72 correct craft ski nautique fun 66 vw 1500s will finish someday |
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03-11-2003, 04:39 PM
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1974 Porsche 911 2.7
