The Formula One team conducted the third test of the VJM04 on the second day here yesterday, where the 24-year-old Paul completed 80 laps of the Circuit de Catalunya, split over a variety of run lengths and set-ups.
Paul also tested different tyre compounds over longer runs and, with only one period of downtime, largely completed his programme. He posted the ninth quickest time.
The programme focussed on putting more miles on the car to gather more information on performance and balance. Force India's another driver Adrian Sutil will take over from Paul
for the remaining two days.
"Today was a definite improvement over yesterday's running with a lot more laps under our belt. We ran through a lot of set-ups with the different tyre compounds and the car felt more balanced, which showed in a generally better lap time.
"Apart from the problem with the throttle sensor in the afternoon everything went pretty much to plan and we've got a lot of information to feed into Adrian's programme tomorrow and for the rest of the test," said Paul.
Dominic Harlow, circuit engineering director, said Paul concentrated on long run comparison of the tyres with some further aero, brake material and set-up tests.
"A sensor problem later in the afternoon resulted in the only real down time of the day. It was a reliability issue, but in testing and we are confident it is understood and can be addressed. Adrian takes over the car tomorrow and will continue with the tyre programme," he said.