[Joe]

Hey Eric
I have been looking and posting all around the internet including on youtube but I figured I’d ask your opinion….I have a beloved 1978 corvette that more or less out of nowhere has started vapor pinging through carb and exhaust. Exhaust has gas in it that makes small puddles. Engine hs a pretty big loss of power and will miss. I have been told timing however 5%-10 it will run back to normal. It used to get better after warm up now its better on warmup and gets worse. I m told check timing however i hve to buy timing gun and I find it pecuilar it runs than goes into “devil mode”. The engine also goes out on acceleration (ie vrrrooom stop VROOOM) I did full tuneup and blocked vacuum hose before checkvalve. Rochester Carb rebuilt maybe 6 years ago engine perhaps same time I dont remember paperwork that came with car).
Fuel pump? there is new filter so doubt there is blockage.
Carb?
Where do I start?
Help!
1978 corvette L48 350

[Author]

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