Starts randomly 'missing' when it gets to operating temperature?

[i_nick_2005_i]

Car idles high (2000+ rpm) while in open-loop, warming up... no sign of any issues. Then when it gets warmed up, idle drops to normal, and a random hesitation occurs (once every 20 seconds or so, it just falls on it's face for a second...recovers 95% of the time...other 5% it will die completely unless the gas pedal is feathered a bit. Boost leak tested it, passed. I'm almost positive the timing is correct...although I will check base timing tomorrow. I have DSMlink, and I can run and post logs. I just did a log tonight, and every time it hesitated I noticed the o2 voltage dropped to almost nothing. Although I didn't know if that was the cause of the "miss" or if the "miss" caused it...? Throttle body and all components are brand new/rebuilt. Fuel pressure/pump are ok. Plugs/wires are new. Small exhaust leak at 02 housing/downpipe, due to wrong gasket I installed tonight, but leak isn't very bad. It was a stock gasket for a 2G...I'm using temporarily. Any feedback is appreciated...

 

[gofer]

Car idles high (2000+ rpm) while in open-loop, warming up... no sign of any issues. Then when it gets warmed up, idle drops to normal, and a random hesitation occurs (once every 20 seconds or so, it just falls on it's face for a second...recovers 95% of the time...other 5% it will die completely unless the gas pedal is feathered a bit. Boost leak tested it, passed. I'm almost positive the timing is correct...although I will check base timing tomorrow. I have DSMlink, and I can run and post logs. I just did a log tonight, and every time it hesitated I noticed the o2 voltage dropped to almost nothing. Although I didn't know if that was the cause of the "miss" or if the "miss" caused it...? Throttle body and all components are brand new/rebuilt. Fuel pressure/pump are ok. Plugs/wires are new. Small exhaust leak at 02 housing/downpipe, due to wrong gasket I installed tonight, but leak isn't very bad. It was a stock gasket for a 2G...I'm using temporarily. Any feedback is appreciated...

Cool story, any chance we can see that log instead of guessing?

 

[i_nick_2005_i]

Here's a quick idle log...I blipped the throttle right at the beginning because it about died. Then the rest is just idling, at operating temperature. I'm going to let it cool down, then I'll get a log from a cold start to operating temperature.

 

[GsxMan98]

Hate to bump up a 2 month old thread but did this ever get resolved and if so what fixed it. I'm having similar issues and can't find the problem.