What OS's are you seeing covering across years and models where the O2 part number varies?
What OS's are you seeing covering across years and models where the O2 part number varies?
Except I have seen different calibrations for both myself, with different CVNs. There is a difference. I reflashed one that had the wrong calibration to the right calibration and like magic the 02 sensors started working. Also pulled an 0411 out of a swap that someone else had put a startup tune into, put the P59 in it that matched the harness that the swap was built from and magically 02s started working instantly.Originally Posted by blindsquirrel
Last edited by Fast4.7; 12-04-2024 at 07:13 PM.
Yes. It's specifically 0411 swaps to LT1's where I noticed the problem. People remark about the intake runner length. That doesn't make much sense. First of all, it would be intake volume. Then firing order. How else can uneven pulses happen? More importantly, how was CL working on the stock config in the first place?
Had the guy put in the correct O2's for the ecu instead of factory for the car and voila.
OP's case is a swap. That's why I brought it up.
Last edited by SiriusC1024; 12-04-2024 at 07:19 PM.
Almost everything I work with is a swap and most of the garbage swap harnesses are wrong. I tend to wire them for isolated ground and use an isolated ground engine and engine diagnostic section that matches the engine for 0411 and P59 stuff, the case grounded PCM flash will not work with an isolated ground harness setup in my personal experience and vice versa. Alot of the cheap swap harnesses have connectors for isolate ground sensors but are missing the common ground wire to the PCM which means they never work without modifications. Luckily easy to fix if you know what to look for. Case grounded sensors and calibrations are not nearly as common.
Last edited by Fast4.7; 12-04-2024 at 07:33 PM.
The van man knoweth.
My favorite one is the 02 connectors swapped left and right though with swaps, that and cam sensor connectors pinned wrong in swap harnesses. Just had to repin a cam sensor connector last week. There has to be a factory using the wrong year model cam sensor pinout as many as I have seen wrong now. GenIV pinout on a GenIII harness. It is a non-issue now that I know to lookout for it.
Last edited by Fast4.7; 12-04-2024 at 07:39 PM.
Collect VINs from trucks verified as each type then look up the calibrations. I did that and finding more than one where they were identical was enough proof for me, so the internet rumor that PCMs/calibrations are specific to the O2/harness type is no longer a thing I waste brain storage space on.
There is a difference in some of them to do with the heater diagnostics but that does not break down into isolated/case type.
I did. Took a PCM that would not read the 02s, VIN in that PCM showed the other style 02s. Reflashed it to a tune file that used the same style 02s in the swap and the harness was pinned for by VIN. 02s immediately started working. As stated before another customer had thrown an 0411 in another that had a startup tune in it. I went back to the P59 the swap engine and harness came with. 02s started working with the P59 when they would not with the 0411 that was tuned for the wrong 02 setup.
Last edited by Fast4.7; 12-04-2024 at 07:45 PM.
Hey guys fixed my problem!!! Was not a case of isolated/case ground, found out the bank 2 plug had pulled the pins out of the plug enough that all were not making contact with the sensor! Repinned the plug and now they both work! Was able to go into closed loop and log fuel trims! I need better lighting in my garage. Thanks so much for your help! Now we can get back to tuning!
It's not a rumor or myth at least that I knew of. I figured it out for myself through deduction. Again, CL worked on factory why not with the swap? So, sensors swapped and a comparison of O2 action between the logs verified it.
The experience is seconded by someone who's been at this for a long time.
Don't you think you're being a little intransigent?
Glad it's running. We knew there was a wiring problem. The O2 type was a best-practice recommendation.
Now I?m gonna get to ask a whole bunch more stupid questions as I learn more😜
Go right ahead
Do you have a recommendation for a reliable swap harnesses manufacturer?
Reply With Quote