ok so im back with more problems..

quick review of last problem.. after my ecu flash upgrade to 93 octane i got a cel p0299 hours later low boost... replaced the dv valve with a hyperboost didnt fix it.. then i had a boost gauge put in and reset the cel.. didnt come back for 2 weeks but when it did it came back with p0171 and p0300 p0301 p0302 p0303 p0304... misfires and i think 171 is o2 censor.. the cel is a solid non flashing cel.. car seems rough and i can hear misfires hen im idle but none when driving...also i smell gas i think the air/fuel ratio isnt working but im still getting 19-23 mpg..any ideas?

03 a4 1.8t 60k miles
mods in order of install
afe cold air intake 1.5 years ago
exhaust magnaflow cat back 8 months ago
ecu chip 40 days ago..

any help would be greatly apprecaited...

i plan on changing plugs next . tried to clean maf with spray

 

plugs are most likely the problem here

 

How do the coils look? Your car may be eligible for the recall on them if you haven't already had them replaced.

I had a problem with coils 1 & 2 causing misfires.

 

ya got the coils replaced they actually went before the recall and came out of pocket but i got a check back which was nice..

turned out i had a large vaccum leak.. the pvc valve was shot as well

 

what do yano it came back on .. i hate you p0299