1999 Roadtrek 190 RV, 3500, 318,83,000 miles

Will not start after heavy overnight rain.What should I replace? Thanks

 

Hard to say.

Does it have spark at one of the plug wires?

Does the fuel pump run when you turn the key to the "on" position for three seconds?

Have you tried to switch the ASD relay with the AC relay?

Will it start once the weather clears up?

 

Cap, rotor, and/or spark plug wires. Do not use a cap and rotor with aluminum contacts, they fail early.

 

It will start normally after dry out,never any start problems on dry days or after first start on wet days.Thanks

 

Had exactlythe same problem. Computer threw no trouble codes. Replaced ignition coil. Old coil had cracks in coating covering the laminated steel plate transformer core, and rust and moisture finds it's way in, shorting out the coil, but it works and tests fine when dry. Again, I replaced mine after trying everything else and then some, but a new coil fixed the problem. About 30 - 40 bucks, easy replacement job.
Good luck

 

Also , check your engine and chasis ground cables. I had a lot of electrical demons until I fixed bad grounds!!!!!