MatSLO
I'm Awesome
1997 Tahoe with 5.7 Vortec - trouble starting when warm (starts when I fully depress the gas pedal on startup). When cold, it starts immediately, "just show it the key".
Otherwise no issues, truck runs good, always idles smoothly and performs fine.
Checked coolant temp sensor, seems to be working fine.
However, the scanner showed following fault codes: P0141, P1133, P1153 and P0161 (in other words, all four O2 sensors)... BTW, CEL is not on (yes the bulb works)
Before that, I thought the issue might be the fuel pressure regulator, but perhaps I need to replace O2 sensors? Or do O2 sensor readings get messed up because of the problem with the fuel pressure regulator?
Or is it something else?....
And if replacing the fuel pressure regulator, would it make sense to replace the whole spider assembly (with the new MFI spider) while I'm at it?
Otherwise no issues, truck runs good, always idles smoothly and performs fine.
Checked coolant temp sensor, seems to be working fine.
However, the scanner showed following fault codes: P0141, P1133, P1153 and P0161 (in other words, all four O2 sensors)... BTW, CEL is not on (yes the bulb works)
Before that, I thought the issue might be the fuel pressure regulator, but perhaps I need to replace O2 sensors? Or do O2 sensor readings get messed up because of the problem with the fuel pressure regulator?
Or is it something else?....
And if replacing the fuel pressure regulator, would it make sense to replace the whole spider assembly (with the new MFI spider) while I'm at it?