Electrical problem
#1
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Car: 1986 Trans Am
Engine: 305
Transmission: 700R4
Electrical problem
The voltage regulator on my c130 alternator which is stock had to be rebuilt when it failed. I got it back a week ago. I put in back in the car and it started right up. I backed it out of the garage flipped on the head lights... I had my foot on the brake... the windows were fogged up so i rolled the window down an it dropped my voltage down to such a level that it was almost stalling the engine. I let off the window switc and it was fine. did it again after it ran a bit and it didn't change the voltage hardly at all... I go driving down the road and at certain parts the voltage drops and then goes back up. I am not getting any codes... any one have any ideas if that is normal or is something else going on? The battery is about 4 or 5 years old so i am wondering if maybe it is time for my battery to be replaced... not to mention we had an extremely cold winter... i hear cold winters can kill batteries... The car is a TPI 305 1986 Trans Am
#2
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Location: Des Moines, IA
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Car: 90 Formula WS6, 86 Sport Coupe
Engine: 305 TBI, 2.8 MPFI
Transmission: 700r4, 700r4w/vette servos
Axle/Gears: 2.73 Open, 3.42 Open
Re: Electrical problem
Could be the battery but it could also be a weak alternator. If you had to rebuild the voltage regulator than the alt is probably nearing the end of it's life as well. Take it to a parts store have them do a load test on everything.
#3
Supreme Member
Re: Electrical problem
sounds like a bad body ground or other ground/fuselink/
batt cable/connection problem-probably would do the
same thing if the heater blower was turned onto high.
Also check the tightness of the pos battery cable where
it connects to the starter.
batt cable/connection problem-probably would do the
same thing if the heater blower was turned onto high.
Also check the tightness of the pos battery cable where
it connects to the starter.
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