Greg Biffle practices for the NASCAR Sprint Cup Series race at Las Vegas Motor Speedway, Saturday, Mar. 7, 2015. (AP Photo/NKP, Nigel Kinrade) 
FONTANA, Calif. (AP) — Greg Biffle says he wasn't concerned about the overall health of his Roush Fenway Racing team when he said they were "dying a slow death."
Instead, Biffle was just frustrated with the team's start to the Fontana weekend, and he expects it to get much better.
Before Sunday's race, Biffle clarified his comment from Friday after he went through unimpressive practices and finished 29th in qualifying at Auto Club Speedway.
"It's difficult as a competitor to show up at a place you've won twice at and come off the truck 32nd in speed," Biffle said. "You want to unload off the truck and be ... in the top 10 or top 15."
All three of Roush Fenway's Fords didn't get out of the first round of qualifying at Fontana. Biffle has no idea why the team has been slower to adjust to NASCAR's offseason changes.
"You just feel crushed when you've worked so hard and everybody's put so much effort into it and then we come here and come off the truck with that kind of speed," Biffle added. "That really crushed us. That was a blow to us that we ended up in that position off the truck."
Biffle's 10th-place finish at the Daytona 500 is RFR's best result of the season. He sits in 16th in the overall standings, while teammates Trevor Bayne (26th) and Ricky Stenhouse Jr. (27th) are even lower.
"One thing I know for sure is that it's not the engine," Biffle said. "Could it be improved to give us a little more speed or make a little more power? Sure, anything could. But Penske uses the same engine we use. So we can check that off.
"We know it's not that. Then we start looking down the line. Is it suspension or aero? Well, it may be a combination of the two that we need to improve, or it may be one or the other. We just keep looking for what creates speed in the car, and just keep working in that direction."

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