Well yesterday the car idled at high rpm for like 20 min and after i started driving it it stalled, i primered it let it sit for awhile after some time it started but ran really rough like up and down on the rpm than went back to regular rpm and ran fine,after that i lowered the rpm because before that i adjusted the rpm to be higher when the car was running weak,so now it seems like its running good,so i will run a couple tanks of biodiesel and see how it runs..