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WOT misfire at 2-3 shift

01GrandPrixTURBOGT

01GrandPrixTURBOGT

New member
Hi today i got a po300 misfire while going WOT from 2-3 shift. So far its only done it on a 2-3 wot shift. Also still have p0171 that i cant figure out. Im wondering if it could be my battery because ive had to jump my car a few times to start it in the morning.
 


One of the things I've found that can cause a P0171 is low system voltage. Corroded battery cables, maybe a bad battery, poor connections that provide resistance etc.

Vacuum leaks are also common.
 
Alright so I tried spraying didn't notice any idle jump. My gauge says I'm going from around 600 something to 700. It jumps to quick to get an exact number.
 


Alright guys its gotten a lot worse. Now the idle is supper jumpy and sometimes it will die completely and take a few secs to start uo again. I check for vac leak but didn't find one.
 
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