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Old 04-17-2011, 11:16 PM   #19
Foosified
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Join Date: Oct 2006
Location: Edmonton, AB, CAN.
Posts: 152
Re: SBC 350 Engine Backfire Through Exhaust and Carb

I will roll it over and watch the rockers again. Last time I did it everything looked ok. Fuel pressure is 5psi at the carb.
Are you thinking what I'm thinking... Valves are sticking in the valve guides?I will add zinc before I start the engine again and after I check rockers. If the rockers are moving fine I think my issue is probably in the heads and I'm thinking the valve guides. Thoughts?
Quote:
Originally Posted by cableguy0 View Post
Next step. Pull the valve covers off. Roll the engine over by hand and watch the rockers move. Look for any rockers that arent moving as far as the rest of them. Have you checked fuel pressure by any chance? Get a bottle of zinc additive in that engine asap.
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