Misfire, but no DTC's?

[Fabricator]

more maf bad news. ( all this is like first thing i do on any not new car, bogus parts checks, hacking signs, and parts missing)
this car is old, and was in the hands of others
and if you the old owner bought and put in a C4 CHina cloned MAF< well those are most times, junk >>> example:1 http://fixkick.com/sensors/china-maf/cloned-maf.html

PO states that a local shop tried the MAF swap that did not help - he (PO) did not confirm if the replacement MAF was OEM Suzuki, but assumed that it came from the parts supplier the local repair shop uses. In addition, the PO replaced the fuel filter

the side of you maf has a label
58B00: (< usa maf , in Europe >57b, Air meters non hot wire)
this label; (not C4 brands) is marked with makers name, Misubishi, Hitachis or just suzuki, and this number marking, MAF does have the 58B00 label you describe

today we have far better choices (unlike suzuki $1200 priced tag , ouch)

https://www.rockauto.com/en/catalog/suzu...ensor,5128


some cars are hacked, for sure maf end with cold air mod (malarkey to the max)
the maf is now not mounted at all, or still stock and bounces around like toy. killing the maf dead.
I cant see under your hood for all those things wrong, no can do. No cold air intake kit - all stock airbox installation