Thread: po171 under heavy throttle

i cant seem to find a leak sprayed brake clean everywhere and nothing happend i do have egr delete and evap code deleted and car doesnt run to bad so its a very small leak all vac lines are new wht else should i check thanks also it says bank 1 so thats the front side of the enigine right

Originally Posted by BillBoost37

The O2 readings have told the pcm to richen
up the mix because it was too lean. That's why the code set.

Find your vacuum leak and don't worry about the when, worry about the what.

well the front bank has new 103s i put in and the back bank has mt tr55s im changing today i wanted to see if there was a diff but if front bank is numer 1 then ill put tr55s back in and if rear is bank 1 ill put 103s in there

Originally Posted by SlowNA06

What do your spark plugs look like? Are they lacquered, corroded, horribly out of gap?