C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Bewildered!

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Old Mar 15, 2024 | 06:31 PM
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Default Bewildered!

New here and to the Vette world. I have read through the repair manual and through the forum here and still scratching my head. Purchased a 1990 convertible and had it out several times before having to put into storage. Pulled her out last week after doing checkup and drove for app 10 miles when started to lose power, (all gauges normal except check engine/battery light came on) was able to pull over and it died. Used paperclip to check codes and C12 came up then flashing 3 dashes twice then went solid no other codes appeared. Let sit for app 20 min and it started (battery/check engine light went out), ran for a few minutes then engine started "chugging" as if running out of gas (pressing accelerator accomplished nothing). Let sit again and it started up again with same results. Car was stored full tank of fresh gas with sea foam and put in new battery when i pulled it out. I would appreciate any help i can get. Thank you
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Old Mar 16, 2024 | 07:20 AM
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Check alternator and battery first, then I’d look at battery connections and cables (all of them) and grounds. And then look at ECM wiring issues? Battery and starter cables can look fine but be shot inside.

curious what others say

maybe a fuel isssue
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Old Mar 16, 2024 | 11:12 AM
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Thank you, That makes sense, once engine gets hot it could effect electrical connections. Next chance to investigate will be next weekend and will post results.
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Old Mar 16, 2024 | 11:17 AM
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Kind of does sound more like an alternator or connection problem.
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