NEOS97SS

ok, ive posted on this a few times and ive tried throwin a few parts at her with no avail. so here it goes again we'll see if anyone can help.
ill start with my current set up i have a 97 SS A4 3.23's 275/40/17's LT1. i have ramair with a K&N filter, descreened my MAF, 1LE intake elbow, airfoil, stock throttle body w/ TB bypass, i did the FRA mod to get cooler air into the engine bay, i have a 160 stat, BBK UD pulley, taylor 8mm wires, new coil, new denso iridium plugs, new AC Delco o2's with extensions, i have 1 3/4" jet hot longtubes coated with no emissions, no EGR, no AIR, block off plates on both of the holes in the back of the intake, i have a custom 2 1/2" primaries into a 3" collector Y-pipe, i have a 3" cut out after the Y between it and the 3" custom flowmaster catback, i just put in the OBD1 conversion with custom tune for my mods from PCM4LESS with an LT4 KM.
so far that all the mods i have.
now heres the prob. the car runs like a bat outta hell in open loop(warm up cycle) when i first start it. after that when it switches to closed loop and starts to read off the o2's to adjust short term and long term fuel consumption it picks up a miss. its a very random miss and happens on almost all cylinders. prob is it doesnt throw a code.
i work at firestone and our lead tech looked the car over for 2 days and couldnt figure it out. ive sprayed the wires down at night with a fine mist and they dont arch out anywhere the plugs i just put in hours ago and gapped them myself so i know they are correct and good. i just dont know. its almost like she is runnin too lean. b/c it doesnt start to miss untill it goes from ipw 3.2 during warm up to ipw 2.9 after. i cant figure it out and its driving me insane. so any help would be greatly appreciated. thank you.
joe

Injuneer

Maybe I missed something obvious here.... but there is no misfire code in OBD-I.

???????

NEOS97SS

it was doing this with the OBD2 and never threw a code either i just put the OBD1 in with the custom tune thinking it might help but it didnt.

JSK333

Sure your O2 extensions are connected correctly? You didn't burn them on your headers? Since it only starts after closed loop, I'd look at them.

NEOS97SS

i just checked and they are perfect. i even have some kevlar like wrap on them that is heat resistant and fore proof on them so they wont burn.