[msu79gt82]

Mine does. I was under the impression that the MDX would NOT start if the gas cap was not screwed down tight?

Last night in Abilene I pulled into the station, took off the cap, swiped the credit card, and the pump would not turn on. So I tossed the keys to my son and asked him to take it to the bay next door. I forgot to put the cap back on and didn't realize it until he had already started the car?

I didn't think you could do that?

 

[TheWorm]

No, the car will start w/the cap off. The cap off thing you're sorta remembering is that the check engine light *might* come on if the cap isn't firmly screwed in...

 

[Warzau]

Just like TheWorm said you can start it but you will eventually get a check engine light.