Driving with a bad high pressure fuel pump is not recommended. While your vehicle might still run initially, ignoring this issue can lead to severe engine damage and leave you stranded.
Here’s why it’s unsafe:
- Inconsistent fuel delivery
- A failing pump can’t maintain proper fuel pressure, which leads to rough idling, stalling, or trouble starting.
- Engine misfires
- Lack of consistent fuel can cause misfires, which strain internal components.
- Risk of complete failure
- The pump can fail suddenly, cutting off fuel supply entirely.
- Potential for internal damage
- On direct injection systems, improper pressure can lead to lean conditions and even piston or valve damage.
Signs your high pressure fuel pump might be failing:
- Hard starts or no start
- Engine hesitation or surging
- Poor fuel economy
- Illuminated check engine light
- Fuel-related trouble codes (e.g., P0087, P0191)
If you suspect a problem, it’s best to avoid long drives and get the vehicle inspected right away. Catching the issue early can prevent further complications and keep repair costs down.