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What intake are you using? Does it have an EGR valve? ~Michael

I am in the same position. Trying to help figure out what the problem is from across the internet. :banghead: In order to keep it running do you need to pump the accelerator pedal or just hold steady throttle pressure? ~Michael

Not necessarily some times it takes some time for the leak to occur. ~Michael

I would also pull the PCV valve out of the valve cover and make sure it is still intact. I have seen them fall apart. ~Michael

You need to make sure they are all still attached. I would also double check that intake. If the gasket slid out of position during installation it could have sucked through. ~Michael

Not sure of the year, make model or engine but you obviously have a vacuum leak. It may or may not have anything to do with the booster. When you step on the brake pedal it pulls engine vacuum for assist. If you already have a vacuum leak this will kill the motor. It will run on its own while...

Here is my 2 cents for what it is worth. Multigrade oils are oils that have viscosity modifiers in them. When oils are graded they must pass a flow test. The graded is determined by that test. A 20W-50 oil flows the same as viscosity grade 20 oil when cold. As the temperature of the oil...