What drains 1988 - 928S4 battery while parked in winter?

wkbarber
0

Asked by Feb 24, 2013 at 06:42 PM about the 1988 Porsche 928 S4 Hatchback

Question type: Maintenance & Repair

My 1988 928S4 stays parked for two weeks at a time with no one to start it. This is OK in summer but in
winter the battery goes dead after three or four days. Battery is relatively new and nothing is left "on" in
the car except the clock. Is there a block, fuel or radiator heater controlled by T-stat that is coming on in
the cold weather that would be running the battery down?

14 Answers

7jimmy7
16,785

security consumes some,a battery is downed by cold bigtime,you may need big cca, cold crank amp battery for this one, no, no heaters unless seats have them and left on?

There is a phenomenon called leakage current, which for a car battery is a known characteristic. You may notice that all your batteries will not stay even in the fridge for six months. They discharge themselves....this is totally normal. Fully charge this ole boy before putting it in storage...when you pull it out with any luck will have a plenty good charge left....if it doesn't might take a charge but may be time to replace this one.

Js08016
48,075

Cold weather causes batteries to lose their charge faster. My guess is the car has a computer that is constantly draining the battery. In warmer weather it isn't enough to kill the battery because the battery can hold it's charge longer. My suggestion is disconnect the negative (-) battery cable while not using the car. Or bring the battery inside where it's warmer. HTH. -Jim

1 out of 1 people think this is helpful.

Your trunk light is probably on.

I would argue that cold weather DOES NOT cause the battery to discharge, however the output is significantly reduced in cold weather...the battery IS THE SAME hot or cold. The amount of leakage current is probably actually higher at higher temps. Can check with my Dad who's been doing this since the 1950s, but a little bird told me.

1 out of 1 people think this is helpful.

Pop says it's "self dishcharge" loses capacity sitting around, The loss is a discharge slope that starts on high and inceases with time- 20% per month---

they are made calcium alloy intead of antimony--

since 1967...still working at it 45 years--

7jimmy7
16,785

bob neuske? you a sasage mongol from out west?the name rings a bell,if so how the hell does that tie with such efficacious replys for motorcars and their workings

He's just a guy. I'm just a guy. we might be the same guy?

Actually this is a carmel colored half-pakistani guy, who moved to Milwaukee at the tender age of 3 months, have known nothing but divorced parents, and perhaps a dozen carrers ranging from copyboy at 15 to Mechanical Design Engineer at 40- after diagnosed with MS can no longer work....they don't allow it.

If I rub a can of beer, 7jim7 appears!

spent three years with a prybar and wrench taking showers in coolant and having Ford Rancheros trying to run me over. Had a stack of about fifty timing belts was going to make 'fashion belting' out of them, like the way maddona used to wear an oil filter seal as a bracelet, but the wife threw all of them away...still have one I use as my tool tray handle. 93-96 qualifies me for somethin' no?

MrB4
165

Consider a "Battery Tender" from local auto parts store & use it in winter. Works for 911s, so assume it would work for 928.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

928

Looking for a Used 928 in your area?

CarGurus has 35 nationwide 928 listings and the tools to find you a great deal.

ZIP:

Search Porsche 928 Questions

Porsche 928 Experts

#1 Tom Demyan
Tom Demyan
Reputation 120
#2 MTA1968
MTA1968
Reputation 110
#3 Michael Griffin
Michael Griffin
Reputation 100
View All

Related Models For Sale

Used Porsche 911"
123 Great Deals out of 4,797 listings starting at $11,995
Used Porsche 944"
84 listings
Used Chevrolet Corvette"
144 Great Deals out of 16,927 listings starting at $2,995
Used Porsche 924"
8 listings
Used Ford Mustang"
301 Great Deals out of 42,860 listings starting at $1,900
Used Mercedes-Benz SL-Class"
88 Great Deals out of 3,734 listings starting at $4,500