PFF - Pennock's Fiero Forum, PDA Edition

Interstate Batteries for 2.8 Fiero (Page 1/1)

Carlin

OCT 31, 01:41 PM

need help finding a good interstate battery for my car. There's a few options on the website but I don't know what I should get.

here's a link, I already have the model set up in the website

https://www.interstatebatte...-pontiac-fiero-v628l

olejoedad

NOV 01, 09:02 AM

They will all fit.

What fits your budget?

Dennis LaGrua

NOV 02, 03:19 AM

IMO the quality of all new replacement car batteries has gone way down. I purchased my Chrysler new in 2020 and the original battery is still going strong. When I purchase new batteries they last less time. Come replacement time I'll just bite the bullet and buy a DEKA AGM battery, Those have been proven to last a long time.
Unbeknownst to most there are only two large domestic battery manufacturers that make 95% of the brands In the USA.. They are Johnson controls and Exide.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Stingray92

NOV 02, 08:46 PM

I hope I just had bad luck on a Deka AGM 95R

. It was only in service less than 3 years somehow the wife or kid was able to drain the battery to 4 volts, I was able to revive it but this is like the 4th or 5th time I've had to do this. Tested with a battery tester and it's coming out weak

I have 3 other Deka's, 1 in my ride 5 years albeit still puttingit back together, the others are over 10+ years old. East-Penn does quite a bit for lead recycling, not sure about Jonhson Controls or Exide. I miss the green eye Delco's, kind of predictable but reliable.

Stingray

Dennis LaGrua

NOV 02, 10:18 PM

Automotive batteries that are drawn down to a low voltage can suffer from sulfation. They can usually be restored to like new condition with a battery desulfator. I have successfully restored some automotive batteries this way

Vintage-Nut

NOV 03, 09:06 PM

quote

Automotive batteries that are drawn down to a low voltage can suffer from sulfation.

The clock or other parasitic battery drains can kill the battery - keep the battery fully charged or disconnect the negative cable.
In average, my batteries last 8 to 10 years...

As 'Interstate Batteries', I chose at my local auto shop who carries batteries known for their long service life...
I try to buy the highest cold cranking amps (CCA) batteries I can.
On the Fiero, I changed to top posts and side posts as I 'hate' the negative side post location..

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Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

Stingray92

NOV 03, 09:25 PM

I'll report back the outcome of attempting to save this battery. It was @ 12.3 volts yesterday afternoon, tonight 11.7. Yes I might have some other gremlin lurking on the car.

Dennis thanks for the tickler about de-sulfication, quite likely what my battery has going on.

I found this little charger that can do more than my older charger, technology has changed and hopefully this pans out.

As far as exide, Johnson Controls, East Penn I would do East Penn, Exide, then Johnson. Just my 2 cents

[This message has been edited by Stingray92 (edited 11-03-2025).]

Stingray92

NOV 04, 10:50 PM

Ok,

So i let the battery charge overnight, never did get the solid green light of full charge. I did the repair function this evening it took a little over 3 hours and when I tested it was pleased, the result is now good.

I'll see how it goes, hopefully this was just a one off.