was drivin today and went to test out gordys gtech to see what my car had...so i pulled over and got it all ready...was gunna do a couple runs...one where i start off slower then one where i slam it...well started to do the slow one got the boost guage to about 5 and the rpms just went up and down up and down up and down and you could hear the SC then couldnt hear it couldnt...i dont get it...its like when it gets up there on boost it has nothin its like its coughing...could it be i need a new MAF....? i got new plugs wires and coils so that all should be fine...just got a new tank of premium....any ideas?

it sounds like your ECM is pulling timing maybe because of KR? Did this problem just start?

yup...just started...could a bad battery cause this too
?