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1988 911 electrical issues
Need some help- My car which is a 1988 911 has some electrical issues. The battery light blinks about every 15 seconds. When I measure with voltage meter on battery it seems the voltage fluxuates between 13.5 and 16.3. I am having a hunting idle which can be kicked down by steeping on accelerator and letting off(not sure if two are seperate issues). Any advice would be great. Also the battery is brand new as well as the neg. battery clamp. Sometimes the car will not start after sitting.
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03-12-2011, 06:58 PM
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Member 911 Anonymous
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1. Sounds like Alternator ready to go, if your car does not restart even with a new battery your alternator is not recharging. The readings you have is normal for a healthy battery.
2. Hunting could be your ICV needing cleaning, just remove and clean. When it hunts, open the lid and tap on the ICV, it should settle down, an indication of cleaning needed. CHeck the OHMS on the ICV to insure it is still good. If you have AAA service, they can come out to check your charging system & starter while they are there.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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03-12-2011, 07:07 PM
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Northern Motorhead
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For your battery issue,16.3 volts is not a good thing.I assume that would be with the engine running ?
Most likely a defective voltage regulator as it shouldn't be charging over 13.6 with the engine running. Your idle has nothing to do with the battery voltage.There are many threads regarding irregular/hunting idle and if you do a search you will find plenty of information as there could be numerous reasons involved ! Cheers ! Phil
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Cheers Phil 89 Coupe,Black,95 3.6 engine and the list goes on ... 1983 944 SP2 race car PCA #96 |
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03-12-2011, 07:11 PM
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Member 911 Anonymous
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Oh Snap 16.3 I am dixlexic, sorry. Yeah not good.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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03-12-2011, 07:20 PM
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Registered User
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These cars are famous for the voltage reg. and alternator lasting for 'about' 40K. Mine went 20K. If I remember the numbers, they are about $290 for a rebuilt Bosch and $490 for a new update. Fan, etc. must all be removed. Happy trails.
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Richard 1989 Venetian Blue Targa |
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03-12-2011, 08:41 PM
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I hate freight charges
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Mine did the same thing. I didn't waste any time taking it out and giving it to a local guy to rebuild. He had it done in a couple hours and for less than $200. Been perfect ever since.
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Tom 78 911SC SC to 73RS imposter SCWDP crew #50 and 51 1969 Camaro "The new project" 
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03-12-2011, 08:46 PM
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Marble Grey
Baby (for now)
1978 Porsche 911SC 3.0
My Carrera
Miata of Doom!
