check ignition wires.

[zeeman]

its idling around 1600 but its very irregular up and down , surging. the timing is all over the place too.

[zeeman]

dunno, they were on it when I bought it. what side is bank one?

[zeeman]

would it just go bad all of a sudden like that?

[JoeliusZ28]

unlikely but it is possible. they tend to go bad on a new set of ceramic headers if the coating hasnt been baked on yet.

[zeeman]

Ok. But I have stainless.

I had about 15 minutes with it running good. W.o.t. is excellent, but thats about it. Cruising you can hear it misfiring.

I ordered 2 , delco, o2 sensors. Now I need extensions. I solderd in extensions on the old ones. They looked ok. No broken wires.
Maybe I should extend the harness? One side will reach, I don't remember if the other side did or not. It was a bit tight but we'll see.
I'm a bit worried that there wasnt any code on the
o2, only the maf code. But the maf apeared to be
working. so Iddunno.
And just so you know. I did readjust the lifters on the drivers side. Not that that should have any effect on this. But just for informational purposes, full disclosure etc.

[zeeman]

To force it into speed density mode , you unplug the maf, right?
Or is it unplug the o2s?

I'm at work spinning my wheels over this now damnit.

[JoeliusZ28]

Unplug the MAF to force speed density mode.

And the behavior you describe is on par with what I experienced when I had a bad O2 sensor. My car wouldn't run worth a shit at cruise speed, but full throttle it ran great... i remember that pretty clearly because I was trying to get it home from woodward and the car was being a PITA in traffic... when i finally got a clearing i let it rip and got nailed for 23 over ... dont do that

[MENTION=393]Superman09[/MENTION] probably remembers that night

[zeeman]

Ok sounds like a plan.

[Superman09]

Sure do, haha!

Unplug the MAF to force speed density mode.

And the behavior you describe is on par with what I experienced when I had a bad O2 sensor. My car wouldn't run worth a shit at cruise speed, but full throttle it ran great... i remember that pretty clearly because I was trying to get it home from woodward and the car was being a PITA in traffic... when i finally got a clearing i let it rip and got nailed for 23 over ... dont do that

@Superman09 probably remembers that night

[zeeman]

I'm going to have to order extensions. I don't wanna splice any more wires. Does anyone knw hick bank is 1 or how I can figure it out?

[Gregs_gsxr]

Does anyone knw hick bank is 1 or how I can figure it out?

SMH if you mean the word which is bank 1 ? Then its driver side is bank 1

[zeeman]

Yeah thanks. I love this phone.....

[zeeman]

O2's are in. Just waiting for the stupid extension to get here. Think Ill swap out for the fog lights while its in the air. Maybe that'll keep me from wrecking anything else, like the paint on the rear bumper.

[zeeman]

Well that didn't do shit. It did run ok for a while. About 30 minutes. Then it went right back to it. High idle, rpms hunting up and down, spark knocking , missing. Ran like this for a while, then, while I stood there with the hood open, the damn thing stopped missing and the rpms dropped to normal. I shut the hood and made it to the corner. It started to do it again. I took it home and parked it. I unplugged the maf. No change. I unplugged the knock sensor, no change.

I am completely baffled. It doesn't apear to be temperature sensitive. It just randomly decides to run like shit.
It has a new msd optispark, and a new coil, new wires, and plugs and 2 new o2 sensors.

I'm going to borrow an ecm tomorrow and try that.

If anyone has any thoughts, or hunches please feel free to list them. I am out of ideas.

[Lucky SOB]

Does the LT1 have an idle air control valve?