The only thing I see is the IAC counts getting up in the 120's at times, but I imagine this is just the PCM trying to correct the idle rpm (can't see the rpm in that video and I'm getting no audio when I view it on my phone). Did you say the first video was from a cold start (open loop)? I saw on an earlier post you said it was fine until it warmed up and went into closed loop. Did you say the O2's were switching correctly even during the rough idle? What is the target idle to?
Have you checked for fuel issues? It would be a good idea to rule out a leaky injector, which would be more of a problem at low pulse widths (idle).
I'm not that experienced as a tuner, but I know there's tables for 0% TPS which control idle and deceleration, and deceleration fuel cut off (DFCO) tables which, if tuned incorrectly, can cause stalling when coming to a stop and idle problems.
The Iac is trying to compensate for not enough air the higher it goes right?
Sorry about the crappy video will make a new one when I find my scanner. I let someone borrow it.
It doesn't really have a rough idle per say it just idles down way too low and can be smoothed out by throttling it to the correct 950rpm I think it is set on.(or get out and open the throttle screw a bit)
o2's switch fine last i checked, the driver bank was a little lean before I fixed the welds on my headers. But switch fast as any other o2 ive seen. Regardless I will post a video asap that will be much better.
The second vid I think the screw is just a tad more closed then I have it set in the third one so it dies instead of idles really low like the third vid.
The only reason I ever messed with the screw was because it was the only way to get it to start and idle normally about 950, then once warmed up it starts acting up and idles up too much.
As for fuel I guess it could be an injector but It didn't have this problem before the cam swap and I didn't even take them off the rails.
It also has a new fuel filter and new walbro 255
guess I will pull the plugs and see what they look like too.
It has to be something I hope it is o2's or maybe plugs/wires.
The table tuning stuff your talking about i have no clue on
I see what your saying with the decel fuel and stop too but its not just that these videos are just in the driveway
I hate assuming but i feel like a sensor is reading wrong for closed loop and thats what causes it to change so drastically from cold to hot.
Plus it runs excellent
minus the ability to idle at the pcm's desired idle.
PA94Z What is the closed TPS spark advance?
Not really sure?> lamens terms like the idle (closed throttle) spark advance?
Or both the tps voltage and spark advance?
I have the tps set as low as I could get it I think .58 or something but it fluctuates depending on where the stop screw is (aka Me trying to drive it when cold or hot)
I feel like the car has been all over the place with this problem and I can't keep it straight in my head.
LT1, Hotcam, PRW 1.6, 11:1, Ported Heads, T56, 3:23, Pro5.0
Hooker shorties, y-pipe & cat-back, 52mm tb, custom CAI elec wp
xegr smog catx aluminum ds Lca's & relocation brackets Adj. panhard pcmforless tuned