can anyone offer an opinion on this scan? I can't tell cause from result

Thank you

 

what's the truck doing???

please include year and motor size also....

 

With that low coolant temp and ambient air temp, highly doubt yer truck - whatever it is and whatever the complaint may be - is even in Closed Loop yet.

So - you can ignore the above data.

Include the Open Loop Flag in the stream next time.

MGD

 

Why are you logging on initial startup? Pretty meaningless till its in closed loop. I doubt the heaters have even brought the O2's up to operating temp yet.

 

Sorry guys, thought I typed it in, got distracted. Cold start gives 15 to 20 seconds of normal then a hard loping idle that sometimes dies. Only does so when outside temp below 45. The above stats are all my scanner reads and the mid point of data is right where lope hit full on. Drives fine (far as I can tell) soon as you come off idle. Usual suspects (IAC, IAT, MAF, DPFE and hoses) all replaced already.

 

I hate to recommend shotgunning parts, but I might suspect the CHT - I would think the coolant temp should be higher than that after that amount of time. I MIGHT suspect the O2 heaters too.

 

While I understand a cylinder head temp sensor could mess with the computer's calculations, how could the cold weather affect the CHT sensor? I mean right on the engine it should heat up regardless of the outside air temp.