2012 Chevy Silverado 4.3 v6
Feels like it has slow power
won’t accelerate fast
drives smooth when slow but idles shaky
Black muffler tip
i think it’s running lean so it’s injecting more gas so it feels like a smooth ride while you drive but at idle it’s shaky
misfire count 0
i will be smoke testing for any vaccum leak any other ideas ???
codes
p0300
p0171
p0523
P0016
short term bank 1 = 28%
long term bank 1 = 24%
fuel trim cell = 6
injector pwm bank1 =7.5ms
injector pwm bank2 = 4.4
Well it's adding a bunch of fuel which is running lean, but you have a black tip on your exhaust which means it's running rich. You have some serious problems now. Those cars are not known to be all that well made. I would start by testing to see if the head gasket is starting to blow. Then you can go richly and you can do all kinds of things
