o2 problem (EFI Connection conversion)

[Phantom409]

K guys & girls I have an issue and I'm baffled and I need some help.

As some of you know I did the EFI conversion to my car and got rid of the Opti.
Well we went back to the Dyno last week Thursday and there was no change in HP levels

One thing that stayed the same was the o2's
They split like a bad divorce!
At idle they hang right in there, nice and even at a slight throttle but if you start asking for more or go WOT the split BAD!
One is really rich and the other is really lean

We hooked up a wide Band on both sides and it was real close to were we know the o2's are wrong.
We even put a different PCM on the car, same thing.
I check my wiring 3 times today and they buzz out just fine and in the right spot.

I have also swapped o2's with new ones with no change.

So what is my freaking issue?
Help me out if you know or have an idea.

[Phantom409]

The HP problem we believe could be springs.
Car quit making PWR at 3500 RPM and kind of leveled out and picked up again.

[ThreeHonks]

The car needs to be tuned with a MAF and in open loop. I have run into this same situation before, however the car was running fine. I kept throwing a code becasue the O2's were switching between lean and rich too quickly. I also had brand new AC Delco sensors.

Bottom line: Quit wasting your time with them, run open loop. Throw in a MAF on there too

[Phantom409]

I do have a MAF now

[Phantom409]

From what I have dug up today I have 2 optios:

1. redo the harness
2. Buy Wideband o2's (supposed to work better???)

Not going to just throw money at it so well figure it out!

Any one know anything about Wideband o2's and why they are better?????

[ThreeHonks]

why are you against just tuning them out?

[prorac1]

why would you want to tune them out on such a mild combanation? Its a good tool to let the computer monitor the Air/fuel events after the fact of combustion. JMHO, but I think he should take advantage of every LS1 advantage he can. And we figured out what was wrong with the O2 readings, he is building new, 1 piece O2 harness tomorrow. But....................I think Kyle has other plans in the works now.........................."cough" 6 liter "cough". Oh, shoot, did I say that......................................nevermin d, no, I didnt say that. Wait, yes I did, sorry Kyle, BWAHAAAAAAAAAAAA. Thats all, ive done enough damage here, lol, im out. Eric L

[JoeliusZ28]

he is building new, 1 piece O2 harness tomorrow.

kyle told me last night that the wiring was fine. Is this being taken seriously or this just a guess-the-problem game show?

[Phantom409]

kyle told me last night that the wiring was fine. Is this being taken seriously or this just a guess-the-problem game show?

It buzzed out fine Joel but I had to use some butt connectors to make them longer to reach my o2's and I believe that they are causing my data transfer at high rates.
A mistake maybe on my part!

[Phantom409]

And as far as the 6.0...................money is an issue at this point but I have a hook up if I decide to go that route

If I do, well you'll have to wait but by then tail lights are all you will see

[DETROITMUSCLE]

uh on DR LT1 going lsx

[1BADAIR]

buzzed out?

what are the ohm readings.
any exhaust leaks? ANY? minor missfire will cause this too

[prorac1]

I checked it myself Larry. No exhaust leaks what so ever. He put butt connectors in the O2 extensions, and I dont think they are transfering the hi res and lo res signal correctally. And IMHO hes beter off building 1 piece harnesses just to eliminate the connectors. However, I did not ohm the wires, Kyle might have though. Eric L

[Phantom409]

It's getting proper voltage 12v and the high and low res are reading 5v for reference.
I checked all my wires with my voltage gauge and they went to the proper spot but that was just insurance on my part.
Car has no exhaust leaks.

My worry is that the connectors that I used to make the o2 harness longer cant transfer the signal from the o2 fast enough at high speeds so the PCM don't know what the heck it's seeing.

[prorac1]

What hes asking Kyle is ohm the transfer wires and tell him what they ohm. Data transfer is all based on resistance in the wire IIRC. I would re wire them just to avoid a problem in the future with corrosion within the butt connector. Eric L