I have a friend whose 2000 Buick Regal cranks, but won't start when it raining. She has taking it to her mechanic several times, but the problem is still there. I know the fuel pump was changed, that didn't help. She has a running tab with this guy, owes him a couple hundred still. I would like to help her before that tab gets out of hand. There is no fault codes, no check engine light even when it doesn't want to start. Do you guys have any ideas?