a Japan built Benz came to my shop complainant was running rough Customer replaced plugs but still ran the same since it was a Japan built car my scan tool would not talk to it. so a few rest's where done and my finding was a bad fuel regulator it was pouring out fuel when i took the vacuum line off. First time i seen one that bad

Wil Hayward
Technician
Darcy's 23rd St Service
Saskatoon, Saskatchewan, Canada