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Old 06-06-2010, 11:25 AM
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surging idle

got a 88 350 basically stock....i have a wieand 8004 manifold that i enlongated the center holes to fit the engine.....edelbrock 1406 carb seems to surge when running and it will idle up and down any ideas

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Old 06-06-2010, 01:28 PM
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Have you recently rebuilt the carb or done any other changes like distributer ?
If some of the passages in the carb are blocked it can do this. If and When you rebuilt the carb if you did or had it done, Were you careful to blow out all passages? And i even use a thin wire to make sure they are all clear. Or it's best to have the carb boiled if you can.JMO
You need to Check the float level and make sure the float isn't getting partially filled or that the needle valve and seat isn't working loose.
Check out the advance weights in the distributor to make sure they are working right also, and make sure the vacuum system does not have a leak somewhere.JMO and if you enlongated the center holes to fit the engine could be a leak there that's where i would check first. If this is all that you have changed then it's more then likely where the problem is.JMO

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