Drivers will now head into the race with only the information from Friday's practice session to rely on, as the track has remained wet all day and forecasts show little chance of the rain stopping any time soon.
Some teams had anticipated the conditions and ran in race-trim during yesterday's first practice, where they normally prepare for qualifying.
The Sprint Cup series cars are running with a new tyre specification at Texas this weekend. Moreover they are racing with the new spoiler for the first time at a mile-and-a-half track, which adds a few more questions marks than usual for race day.
"I was hoping for rain," said Juan Pablo Montoya, who is set to start the race form 21st on the grid. "To be 100 percent honest with you, 80 percent of the practice for us yesterday was race. All we did was race. We [then] moved the car to qualifying trim...
"It's good because we think we've got a decent race car. We actually started way off from where we needed to be. We made some good changes and seemed to gain on the car really fast and I was pretty happy about that."
Weather forecasts for tomorrow are not very encouraging though, as they show a steady 50 percent chance of rain through Sunday afternoon, with showers expected since the early morning.
The Nationwide Series race is scheduled for today, but NASCAR officials are still waiting on the weather to make a decision on possibly rescheduling the event for Sunday.
However the event could be run later today weather-permitting, as Texas Motor Speedway has artificial lighting to allow for a night race.
Callejon race hots upRain postpones NASCAR to Monday