I have a 99 toyota cambry with 189,000 miles. just recently when it rains a lot i have trouble starting it. After it hasn't rained for a while it starts. one place told me it could be the ignition coil, another the fuel pump. i lean toward the ignition coil. I think something has a crack in it and moisture is getting in.
engines hard to start when raining on 1999 Toyota Camry
by amyal in Altoona, PA on March 16, 2011
ANSWER by raiderron , March 16, 2011
If is cracked and allowing moisture in then would cause this problem. Does not sound like fuel pump. Cannot see why rain would effect it.