99 wrx misfiring

I

ianfl

Octane Boostaholics
car does it intermitingly seems to get bogged down as well and wants to cut out any ideas
no engine light or codes
maf and plugs couple months old vacuum lines seem ok pump is priming when turn on ignition
found bad battery connection on the neg hardly would cause it would it
 
Cleaned maf reset ecu put it back in no codes driving ok we see how long that lasts :multijump:
 
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