Do you have a check engine light on and or flashing with engine running ?
Scanner should pick up the codes
check fuel pressure ,check it for tune up and if firing all coils
back fire will damage MAF sensor and cleaning it will not help and may need to be replaced
have to solve the misfiring issue 1st

Answered by BMRFIXIT (expert)
19,736 answers provided

yes check engine light is on i unplugged MAF sensor and vehicle ran even worse.Am i correct in assuming that MAF will either work or not or could it be working somewhat but not properly.I was hoping that if unplugging it had a different result that it was actualy functioning my plan was to try the same thing with the O2 sensors 1 at a time and see if there was any change.Will be changing spark plugs first pulled one today and it was covered with carbon and electrode looked to be about half the original diameter. Thanks for your help BMRFIXIT i appreciate the response and hope this info might narrow down my issue some.

Response from juggernaut615
13 questions asked