misfiring on start up in mornings

:welcome2: hi all , im having a problem this week when starting from cold 1st thing each morning , it starts up ok then it is struggling to drive and its backfiring ,i have to sit there and slowly bring revs up and warm engine before it wants to go . this has only started last 3/4 days ,it runs great after its warm then perfect onto gas . my question is apart from clean fuel , plugs ,(new) coils and leads (new) is it the maf ? if so is this the unit on the air filter tube and how best to clean it ???? all suggestions would be appreciated , also what is cheapest option to put it on a diagnostic machine and wich one ??? , my rangie is a 4.6 v8 vogue 2000 model with thor engine done 87000 mls and regulary serviced . it is also fitted with a multipoint lpg which is also well serviced and only 2 yrs old ,,,kind regards MOZZ

Sorry mozz Mine started that when my liners went south due to water creeping into the affected bores when left overnight. Fire it up and feel if the top hose is pumping when revving up. Fingers crossed it's just a plug or something simple.

When mine started doing that it turned out to be blown
Head gasket get a sniff test done mate

if its the maf it will miss all the time on petrol. hot or cold..

temp sensor