Mr3GTP

Sounds like blow-by. In other words, the rings are worn out and it needs rebuilt. An alternative might be a junkyard motor, if a low-mileage one can be found. Try TempoTopaz.com :: Tempo Topaz Car Club of North America or TTOA - Tempo & Topaz Owner Association, someone there may have a line on a cheap replacement.

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'88 Tempo LX 5-speed, S/C'd & Intercooled 2.3 HSC.
http://www.cardomain.com/ride/690230/1