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Electrical 'flutter'


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#1 jross

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Posted 28 March 2006 - 05:44 AM

So, I've got a 1998 C70 HPT sitting in the driveway here. It's got a wierd little problem, esp. noticable in cold weather. When letting off the gas sometimes, some of the electronics will shut down. Radio tends to shut down too when going off-throttle. Recently swapped the battery to an Optima Redtop, which actually alleviated the symptoms, but it's still happening.

I'm thinking the voltage regulator is the culprit (on the alternator). I have another alternator on standby, but I wanted to see if anyone else had any thoughts.

By the way- by electronics, I mean all the electronics. Lights will go, dash will go, ABS/TRACs, radio, the works. The car actually shut itself down completely this AM.



#2 prasamin

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Posted 28 March 2006 - 05:45 AM

QUOTE(jross @ Mar 27 2006, 09:44 PM) View Post
So, I've got a 1998 C70 HPT sitting in the driveway here. It's got a wierd little problem, esp. noticable in cold weather. When letting off the gas sometimes, some of the electronics will shut down. Radio tends to shut down too when going off-throttle. Recently swapped the battery to an Optima Redtop, which actually alleviated the symptoms, but it's still happening.

I'm thinking the voltage regulator is the culprit (on the alternator). I have another alternator on standby, but I wanted to see if anyone else had any thoughts.

By the way- by electronics, I mean all the electronics. Lights will go, dash will go, ABS/TRACs, radio, the works. The car actually shut itself down completely this AM.



damn dude, that's pretty insane.

#3 96PlatinumEdition850

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Posted 28 March 2006 - 06:07 AM

I would say your alternator is dying but if you drove it for a long time your battery should die if the alternator is faulty. But if you've got one you should put it in and see what happens.
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#4 n8-50

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Posted 28 March 2006 - 06:31 AM

QUOTE(jross @ Mar 27 2006, 09:44 PM) View Post
So, I've got a 1998 C70 HPT sitting in the driveway here. It's got a wierd little problem, esp. noticable in cold weather. When letting off the gas sometimes, some of the electronics will shut down. Radio tends to shut down too when going off-throttle. Recently swapped the battery to an Optima Redtop, which actually alleviated the symptoms, but it's still happening.

I'm thinking the voltage regulator is the culprit (on the alternator). I have another alternator on standby, but I wanted to see if anyone else had any thoughts.

By the way- by electronics, I mean all the electronics. Lights will go, dash will go, ABS/TRACs, radio, the works. The car actually shut itself down completely this AM.


If it's the alternator, it's probably shorting out rather than shutting down. I had a nissan truck that the alternator went bad on. I could charge the battery overnight and drive on just the battery for a while (20-30 minutes or so), but then the engine would start to spudder and the lights would go dim, and then the truck would die and not restart. It might be a loose battery cable, or some other main power cable.
Nathan
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96 850 Turbo Wagon
111,000 miles
Ebay Ford o2 sensors, Nakamichi cd40 head unit (speakers to follow stage 0 aka fixing broke stuff).

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#5 jross

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Posted 28 March 2006 - 06:43 AM

QUOTE(n8-50 @ Mar 27 2006, 10:31 PM) View Post
If it's the alternator, it's probably shorting out rather than shutting down. I had a nissan truck that the alternator went bad on. I could charge the battery overnight and drive on just the battery for a while (20-30 minutes or so), but then the engine would start to spudder and the lights would go dim, and then the truck would die and not restart. It might be a loose battery cable, or some other main power cable.


I'll try the cables and see if there's any luck with that. The car runs okay (drive a couple hundred miles with this problem), but there does seem to be some temperature dependance (more apt to occur in v. cold weather).

QUOTE(prasamin @ Mar 27 2006, 09:45 PM) View Post
damn dude, that's pretty insane.


Yeah, I'm not having a good year with these cars.




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