Defective ignition coil(s) Bad spark plug(s), spark plug wires, or spark plug boots. Faulty fuel injector(s) Malfunctioning fuel delivery system (fuel pump, fuel pump relay, fuel injectors, or fuel filter) Major engine vacuum leak. EGR valve stuck in the wide open position. Clogged EGR ports.
The following conditions can sometimes cause smelly urine, but they are uncommon: 1  urinary stones â these may cause an ammonia-like odour (read about bladder stones and kidney stones) 2  a bladder fistula â this is an abnormal connection between your intestines and bladder.
Cloudy urine that has a foul odor (fishy), especially if it is accompanied by a foul urethral discharge, is most likely due to a urinary tract infection. However, a lack of odor and discharge does not exclude an infection as a possible cause of cloudy urine.loudy urine that has a foul odor (fishy), especially if it is accompanied by a foul urethral discharge, is most likely due to a urinary tract infection. However, a lack of odor and discharge does not exclude an infection as a possible cause of cloudy urine.