Okay Volvo geniuses, here's a weird one for you. My 86 240 DL (119K)
miles is finally treating me right after replacing the engine harness,
cold start sensor, fuel pressure regulator, timing belt, AMM, master
cylinder, head gasket, plugs, cap, rotor, relays, and fuses.

Except for one weird problem. After start-up, cold or warm, the engine
hesitates a long moment when cornering for the first time. Then it
"kicks in" again, in the same gear, though it seems at a  slightly
higher (though appropriate) rpm. Generally speaking this is a mere
annoyance, though the momentary loss of acceleration can be problematic
if I'm trying to turn out into fast traffic from, say, a store parking
lot.

I think it could be one of two things -- 1) some kind of fuel delivery
blockage, maybe from debris in the tank. Except the symptom seems too
consistent in appearance and duration for that
2) a momentary short caused by engine wires moving as the car turns.

What do you think? How to troubleshoot?

Thanks!