Shouldn't run the engine with a high percentage of fuel in the oil. It is possible to not have any symptoms and have a failed hpfp follower Power loss at high speeds
HPFP failure diagnisis and visual symptoms | Club Touareg Forum
The car may accelerate acceptably at low speeds but struggles or “runs out of breath” on the highway
When towing, climbing steep grades, or.
Learn the symptoms, replacement cost, and common issues of high pressure fuel pump failure in audi a4 models Get expert insights on diagnosis and repair options. Learn about this problem, why it occurs, and how to fix it. You will feel a rough, shaky idle and may notice vibration or stumbling while driving at constant speeds
The check engine light will often flash during active misfires, as they can quickly damage the catalytic.
