99 Silverado 5.3 vortec Truck missfire 4000 to 6000 rpm po332 po171 p0174

[Benjamin Fuller]

Truck runs fine Under normal driving under wot it Boggs and pops sound like miss fire no missfire codes ltft at +25 go down  to +18 5000 rpm at idle stft at +24 stft allway around 0 when driving start fine fuel pressure at 62 key on 52 runing new fuel lines new filter it does the same no matter what the engine temperature is  codes are p0174 p0171 p0332 and some time it hesitates at 45 to 60 I have a data sheet from BlueDriver in the link that shows all the sensors and what they’re reading as I drive along any help would be much appreciate it cause I don’t wanna throw parts at it it’s my first vehicle

DataLog-Aug_21_2021_5-07-08-PM.csv

Edited August 21, 2021 by Benjamin Fuller

[CamGTP]

If fuel pressure is always good, then you have a vacuum leak with those lean codes.

 

My guess would be the EGR tube into the intake manifold or your intake gaskets are in need of replacement.

[Benjamin Fuller]

I think it it intake gaskets too i but can not get leak to show but got to do them because of knock sensor 

[Benjamin Fuller]

It idle fine and don’t stall at all

[Benjamin Fuller]

I have noticed run a little worse with cooler weather it probably time for gasket change it has 223000 it Jerks a little when you let it coast down drive from stop

Edited August 22, 2021 by Benjamin Fuller