No, there is always a risk of backfire which could damage the intake and more. If you want the car on the road and working, there are some basics you must do. Otherwise take it to a mechanic.

If you cant, then do the basics. Change the fuel filter, inspect or change spark plugs, etc.

But based on what you have said thus far, I really recommend a mechanic.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car