Yes you can drive it but it will run lean and get poor mileage with poor performance.
Irratic idling condition is indication of intake/inlet manifold gasket leak. Change gasket immediately. This particularly applies to EFI engines. Newaz.
Your intake manifold gasket needs to be replaced.
To replace the Suburban manifold gaskets, unhook everything on the manifold, from fuel lines to vacuum hoses. The manifold needs to be unbolted then removed. Clean the old gasket material, then install with a new gasket. Make sure to use factory specs when torqueing down the bolts.
The exhaust manifold needs to have a gasket in place to help seal the juncture between the manifold and the engine. After the gasket and gasket sealer are in place, tighten the bolts for the exhaust manifold. The exhaust pipe can then be replaced on the new exhaust manifold.
A bad gasket can cause the air fuel mixture to enter the coolant stream, and cause bubbles in the overflow bottle. The gasket needs to be replaced.
bad gasket. needs replaced
Sounds like the head gasket may be leaking to allow the coolant to get in the oil but it it still sealing well around the cylinders. Yes, lower intake manifold gasket is probably leaking. Very common in 1997 and 1998 models. Good engine, just needs sealed up.
coolant by pass hose needs repaced under intake manifold to water 1996 Lincoln town car
Most likely you are burning antifreeze. This could be cause by a leaking head gasket or an intake manifold gasket. This condition needs to be corrected quickly, as it could lead to catastrophic engine failure.
depends if the 350 is fuel injected or carbureted. If carbureted, the likely cause is the carburetor itself, such as a stuck float preventing fuel from getting into the manifold, or bad fuel filter blocking fuel delivery, or fuel pump. If the carb is sucking air, which is simple to check, then the manifold is not blocked, you could however have a bad manifold gasket, or even a warped manifold, which would prevent the necessary vacuum from doing its job. If fuel injected, bad or dirty injectors, or manifold gasket leak, or even fuel pump itself. The Manifold needs Vacuum to operate properly, but on fuel injection, the fuel needs to be delivered at high pressure. you could also have a bad gasket between the carb, and the manifold.
That narrows down which head needs a gasket or which side of intake needs a gasket. Check your oil for signs of water in pan.
You need to BClear. What Engine are we working with? In General the answer is no.