Unsure about recent problems. I recently filled up at a truck stop, cheap diesel. Afterwards, I noticed performance problems. Motor feels out of tune, weird vibrations. Erratic idle, motor dies. The car loses power when driving up hill, slows down to 10 MPH. Also, my transmission seems to hesitate when freeway driving, won't shift into passing gear. I'm wondering if this is due to fuel starvation. Could this be injector related, clogged fuel filters? Is an injector cleaner available? Could fuel issued affect transmission performance? Vacuum issues perhaps? Thanks for any input.