One problem related to fuel injector has been reported for the 2001 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Ford Focus based on all problems reported for the 2001 Focus.
Car would lose power, buck and surge, stall on highway and side streets. When taken to dealership, tech couldn't give explanation for what particles were that clogged fuel pump. Charged for over $900. Tech said warranty didn't cover vandalism. However, my insurance company ruled out vandalism upon investigation to the parts and fuel sample. Bottom line, I had to pay $900 for someting that at the time wasn't ruled a "model" problem. Now I think I should be reimbursed. Fuel pump had to be replaced, lines flushed, and "contaminated" fuel to be exposed of.