You have two discreet problems:
The smell you are getting inside the cabin that is marinating your clothes is due to a leak allowing fumes into the cabin. It could be your boot seal or a hole in the floor pan near the rear of the car. You may also have an exhaust leak anywhere from the manifold to the rear contributing to this problem. Opening the windows whilst driving makes any leak in the boot seal or floor pan worse.
The tuning problem I won't comment on, best to get someone confident with the older microtechs to sort out your tune and start up rather than fiddling around with it if you are not confident.
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