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Q: Engine misses, overheats, exhaust smells sweet. on 1993 Lexus SC400

I wouldn't think that a bad head gasket would cause all of these problems but you never know. Has anyone else had this problem? If so, any help is appreciated.
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If the exhaust smells kind of sickly sweet, that really sounds like burnt coolant coming out of the exhaust pipe. I would have your head gasket checked ASAP by a good shop. And, yes, a blown or leaking head gasket can cause all of these problems and more. Best of Luck!
If this is the case, can I still drive the car, or am I going to cause more damage to my engine.
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