[s-cars] CPS Question

[racingiron at comcast.net]

I've had a few incidents of my '92 just shutting down on me while driving recently. The engine just cuts out completely, and the tach falls to zero even while the car is still coasting in gear. All electronic accessories remain powered, and the starter engages, but no immediate restart. After sitting for a period of time, it just fires up and runs fine. I verified fuel pump operation and no fault codes. I'm thinking CPS at this point. One weird thing I noticed during last night's episode. The stock boost gauge, which normally shows 1.0 BAR with key on before starting the engine, was showing 0.2 BAR when the car was refusing to restart. I eventually had the car towed home, and while rolling the car off the truck, I noticed that the boost gauge was back to 1.0 when I turned the key. Actually, it started at 1.0, gradually dropped to 0.2, then went back up to 1.0. I hit the starter, it fired up, and I drove off the truck. [sigh] Anybody know if this boost gauge behavior points to the CPS of is an indicator of something else? 

TIA, 
Eric R. 
'86 urq 
'92 urS 
'93 urS