LOUDON, N.H. – Jimmie Johnson hasn't hit his stride – yet.

Despite getting off to a solid start in his quest for a record fourth straight NASCAR Sprint Cup championship, things haven't gone exactly the way Johnson would like.

"I'm real happy with the speed in the cars," he said Friday at New Hampshire Motor Speedway. "But, unlike other years, we've made more mistakes as a team."

Pit stops were one of the areas he cited in lamenting missed opportunities. He finished 22nd at Michigan, where he had the lead before running out of gas, and fourth at Phoenix, where Johnson said he felt he had the fastest car but lost because of mistakes.

Johnson has two wins and is third in the points heading into Sunday's Lenox Industrial Tools 301 but didn't absolve himself from making some uncharacteristic mistakes.

"Like last week, I got nailed for speeding on pit road [at Sonoma]," he said. "I've made plenty of mistakes like that this year. I've crashed a couple of cars that I shouldn't have."

So why all the slip-ups from a driver like Johnson, who tied Cale Yarborough's record of three straight Cup titles and has never finished worse than fifth in the points in his first seven seasons?

"We're all human," he said. "I would say more than anything, it's just trying too hard.

"In a lot of cases, for myself, there's a sweet spot that I've been able to hit at times and, a lot of times when I'm not performing, it's because I'm trying too hard. ... It's just one little hiccup from time to time that takes us out of contention for the win. We still finish well, but we've got to stop making mistakes."

With Friday's qualifying rained out, the 43-car race field was set by car owner points. That means Johnson will start third, behind series leader Tony Stewart and Hendrick teammate Jeff Gordon.

"I think we can be better than where we're at, but I'm very happy to see the progress," Johnson said. "We've been cleaning up things over the course of the year, and I think we're going to be just right when the Chase starts."

That's not good news for the rest of the Cup competitors, but Stewart isn't worried.

"I look at it this way: How scary is it for them that a new team is leading the points?" Stewart said, grinning. "And that's no disrespect to them, but we feel we've got room to gain each week, too.

"This is our first time around with each other, it's the first half of the season and we're just getting ready to go back and start working off the notes we first established at the beginning of the year."

Johnson also likes the position he's in with 10 races to go until NASCAR's 12-man postseason begins in September, also at New Hampshire.

"We'll experiment with some stuff and try to validate it for here so when we come back we have a read on whatever package that is," Johnson said. "We're not looking for the home run. We're just kind of making sure we've got it right."