My 1993 Volvo 940 Turbo Wagon starts and runs great in dry weather, but in wet weather, i.e., after/during rain, in very humid conditions, it has trouble starting and often won’t start. The engine turns over but doesn’t run. I got it started this morning after opening the hood and cranking it, thinking that the airflow might dry out whatever the issue was, but after driving for 3 minutes it stalled at a stop sign and I had to repeat the process.
A wire to the alternator was recently replaced, which I thought should have stopped the problem, but it didn’t. The alternator checks good, and the check engine light is not on.
I’d appreciate any insight into fixing this problem.