DTC P0300 and P0174

[68problemchild]

Hello all. It has been about 5 years since my last post. I have an LSX 376 (E38) mated to a 4 speed automatic (T42) in a 68 Camaro. Ian you may remember me!

In any case, it has been throwing all kinds of codes after 5 years of running awesome. I changed everything mechanical. MAF, Throttle body, injectors, Coils, O2 sensors, wires, lifters, air filters, electronic gas pedal, you name it. Since I have not programmed for so long I was pretty clueless how to hook it all up again.

I was able to record a tune today. The passenger side bank is clearly missing and the exhaust smells like way too much fuel unburned. My tuner who made final mods 5 years ago is too busy to help now. But he thinks my computer may be bad.

Any help would be greatly appreciated!

[joecar]

Your log shows HO2S11 (Bank1, B1, left bank) voltage staying high, indicating overfueling on B1...

it might be caused by faulty NBO2 sensor on B1, or leaking injectors on B1.

[gmh308]

What Joe said .

[joecar]

Hey Ian,

How's it all going...?


I just read what I wrote and my spelling is bad enough to make my grammar look poor.

[68problemchild]

Thanks guys. Its nice to hear from you all. I will replace the sensor and resend a log. Injectors have been changed.

[gmh308]

LOL great thanks Joe. Your spelling & grammar looked fine.

Hey Ian,

How's it all going...?


I just read what I wrote and my spelling is bad enough to make my grammar look poor.

[68problemchild]

Hello guys. Here are two logs from today with a new O2 sensor in bank one. First is relatively cold. Number "4" is after warm up. The injectors were new a couple of months ago but perhaps they are still a problem?

Thanks in advance!

Patrick

[joecar]

B1 O2 sensor voltage shows it being less responsive compared to B2...

[68problemchild]

I will go through the wiring on the B1 O2 sensor but is it likely this is a computer issue?

[joecar]

Swap the O2 sensors B1 with B2 and see if the problem follows the O2 sensor or if it stays on the bank.