Ive notice that every time I wash my car when I have to move it doesn't start up right away. I have to push down on the gas to it to start it up. Now this morning after it just rained it had the same problem again. It wouldn't start up till I put gas into it. The problem happens when its on my driveway on a small slope down.

Does anyone have this problem?

 

This happened to me one night after leaving work. The car sat for about 8 hours. Never happened again though.

 

power wash, hand wash, engine wash?

 

Hand Wash.