Good evening
Fuel pressure test would the next troubleshooting step. Next would be inspecting/troubleshooting the MAF sensor.
Good Luck.
Good morning
How is fuel pressure after shut down? Do pressures pass the leak down test?
Look at 34 seconds in....the computer starts dumping fuel for some reason....
Yea, I think that's because I'm playing with the pedal. That log was me pulling out of the driveway in reverse. Placing it in drive and then flooring it going nowhere. I then went back into the garage.
You're either losing spark or fuel on that one side....the other bank looks to be running okay, but rich (looking at HEGO's....or IEGO's here) ....I think that rules out fuel pressure and fuel pump issues. Both STFT's are high in an attempt to fix the lean condition one of the O2 sensors is seeing (passenger side)....but in doing so, gets the driver side reading too rich and throws the code 173. I would have expected that you'd get a passenger side lean condition code, judging by the datalog.
I'd check your O2 sensor wiring real close...it looks like it almost completely loses signal intermittently and starts adding fuel to fix its perceived lean condition, but instead is just bogging you down until the engine is running fast enough to use the extra fuel.
It would be interesting to see what a WBO2 was reading too.
Thanks, Matt. I think you might be on to something. I'll inspect the wires on the O2's and see what I can find. When referencing banks 1&2. Which side is 1 and which side is 2 ? I think I've always been confused by that. I've always assumed bank 1 was passenger side of the block.
Also, code 173 is telling me right side is rich. Wouldn't that be passenger?
I think whichever side has the #1 cylinder is bank 1. In our case, the passenger side.
Have you reset the codes and gotten the 173 again? I'd rely on your datalogs more than your codes either way
There are times where bank #1 is adding fuel and bank #2 is removing fuel and the engine is doing nothing more than idling. So my inclination at this point is a massive air leak. All I can think of is the intake manifold gasket.
I have reset the codes, yea. It keeps coming back and I'm not surprised by what I'm seeing on the ST and LT FT's. I mean, I see one bank high in the positives while the other is deep in the negatives. Adding fuel, removing fuel and that must be because it's drawing air on one side. I'm thinking the side where it's always adding fuel is probably the side the manifold has worked itself loose.