What am I doing wrong?????

[DPS]

That's funny, I just posted a similar question on LS1Tech where he started a thread.

http://www.ls1tech.com/forums/pcm-di...-out-logs.html

Nevermind, I see the dislexic Doc has already been there!

[poconojoe]

Just to be on the same page...240 with aluminum 5.3 with cable driven throttlebody. Worked fine on the 1MB 04 GTO pcm. The switch to the 411 was for a/c??? Really dumb question- 04 GTO's had a/c. I'd really like to help.

Gto use the BCM instead of the PCM for the low speed fan function and the AC request.
It seems like the only 6243 (same as the gto) PCM the uses the PCM for the fan and AC request is the OS for the 2004 Corvette and its DBW not DBC

[DPS]

What would it take to run a BCM with the 6243 PCM? Are there any junkyards close by?

Just throwing it out there.

[poconojoe]

What would it take to run a BCM with the 6243 PCM? Are there any junkyards close by?

Just throwing it out there.

Grant has the correct BCM but now you're adding a bunch more wiring. By the way it can't just be any BCM it has to be one from a GTO

[Doc]

You get a gold star! why pay when you can run diarreah of the mouth for free?!? F/A-18 hornets are so much simpler-just government jackass engineers vs. third party engineers who all want to short change the program! Easy to spot the frauds unlike the mods/management on LS1tech.

[Gjohnson]

Ok, here's another log. Still working with the old F-Body PCM just trying to see what is going on the the O2 sensors. Checked both sensors for grounds and power, as well as continuity throughout the high and low signal wires. Everything checked out great, but still no readings.

Attachment 8807

[joecar]

Do you have the NBO2 heater ground connected to vehicle ground...?

Do you have the NBO2 signal return connected to the PCM NBO signal return...?

[poconojoe]

Do you have the NBO2 heater ground connected to vehicle ground...?

Do you have the NBO2 signal return connected to the PCM NBO signal return...?

I went over this with him and yes he has the O2 heater returns grounded and the returns run back to the PCM, I had him check the continuity of the O2 wires and it seems to check out. The low side of the signal wire isn't grounded, but he's running grounded (non-isollated) O2 sensors, so they should be suppling the ground

[joecar]

It's pretty strange, his NBO2 voltages are just floating at around 450mV...

[poconojoe]

It's pretty strange, his NBO2 voltages are just floating at around 450mV...

I told him to try logging without them hooked and see what it says, even though he's running non-isolated (grounded) O2's, I wonder if they would work better with the low side grounded, I'm just worried you might end up with a ground loop
The other 2 PCM's are on there way