Really need help with the last small issue with my 90 - ZR-1 Net Registry Forums

Corvette95 · 08-20-2020

So this morning, new battery installed yesterday and trickled charged all night. Starting voltage was 13.35...started..cranked....same thing..DataCat shows all type of issues...restart fine, datacat fine...start....fine. This is what I tried this morning..because if its a ECM issue, why overnight sit? I unplugged battery, sit, rehooked battery, started fine Removed ECM, reinstalled , no change.started fine...WTH? The only thing else I know to do is let it sit again, and start tomorrow with alternator unplugged. I did check alternator voltage while running, no fluctuations..charging +/- 14.10 volts steady?

08-20-2020	#24
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,121	Re: Really need help with the last small issue with my 90 So this morning, new battery installed yesterday and trickled charged all night. Starting voltage was 13.35...started..cranked....same thing..DataCat shows all type of issues...restart fine, datacat fine...start....fine. This is what I tried this morning..because if its a ECM issue, why overnight sit? I unplugged battery, sit, rehooked battery, started fine Removed ECM, reinstalled , no change.started fine...WTH? The only thing else I know to do is let it sit again, and start tomorrow with alternator unplugged. I did check alternator voltage while running, no fluctuations..charging +/- 14.10 volts steady?