Buemi wants Renault e.dams to strip car down after Formula E issues

The Swiss driver won the season opener and took victory from fifth on the grid in Punta del Este, but suffered technical problems in Putrajaya and had to charge from the back of the grid in Buenos Aires after a qualifying mistake.

He made another error in qualifying at Mexico City before a messy run to third, which became second after Lucas di Grassi was excluded, then had a crash in Long Beach after missing out on the superpole.

It means Buemi has slipped to a one-point deficit to di Grassi in the championship.

e.dams discovered a brake system problem after Mexico that it believes was a factor in its driver's run of qualifying mistakes, and Buemi hopes more intensive analysis before the Paris round on April 23 will allow it to regain composure.

"I think we need to work on all details to try to find the serenity and the performance," he told Autosport.

"Now we have the car going back to Europe so we will send the mechanics to Donington and take apart the whole car.

"I think we have some small issues going on but it's difficult because you only have one day when you arrive [at races] so you can't go into detail, you do the basics.

"All in all I still think we can do it - we had a fantastic start, now we are having a hard time.

"We will be back in good form for Paris."

Buemi insisted there were no major performance issues in Long Beach, where he and team-mate Nico Prost both failed to make the superpole session in qualifying and finished outside of the points.

He apologised to Robin Frijns for rear-ending the Andretti Autosport driver and ruining both drivers' races.

"The performance was back in the race," Buemi said. "I'm a bit annoyed I didn't show it but I was starting to come back.

"We were quicker than the rest and I caught them a lot in the opening laps - I'm disappointed because it's a missed opportunity."

Prost has also called on Renault to rediscover its early-season form and clinch the teams' championship, and said he would now evaluate how he can aid Buemi's drivers' title bid as well.

"The target for the rest of the season is obviously the teams' championship and maybe I need to help Seb - in a fair way," he said.

"I need to work with him because for me it will be very hard to win the championship.

"We must understand why we've completely lost the edge. Now we're not the best team any more.

"Maybe we were too far ahead and took it a bit too easy."