Apparently Liana has engine faults- Yes, when Liana was launched, FF CNG has problems, they rectified it later on.
And as usual, most car owners get the job done from mechanics, who usually don't know ABC. When they couldn't understand the car, " yeh gari faarigh hay, yeh masla hay bla bla." That gave the car a bad name.
To top it off- Swift has same engine as Liana, the M13-A, just the air filter housing is different. I ain't facing no issues. Liana is very comfy and spacious.