Cold Start Manners

Howdy. My LS1 does not like to idle when cold. On first start of the day I have to sit there and baby sit the throttle for the first minute or 2 or it'll die. Once it gets warmed up it idles at a rock steady 850 and has very good throttle response. So it seems to me to just be a problem in that "open loop" period on cold startup.

This seems to be a common problem as I see many threads on the various forums complaining of similar bahavior. There are suggestion to do a "TPS reset" and a "IAC relearn" but procedures vary. Does anyone have the true steps to perform these? I also see suggestions to clean the IAC and clean the MAF wire. Both of these parts I got used so I should try cleaning them. Has such cleaning helped any of y'all?

But the real culprit is probably the tune. My engine has fairly big cam and I read that it takes a lot of tuning time/data to get nice cold idle manners. I suppose it's likely the shop that rebuild and dyno-tuned my engine didn't really put the effort in for this. It's not the end of the world as once I get a couple minutes of running the engine is all good. Perhaps I should just be happy with that.

Any other suggestions for things to try short of getting it re-tuned?

Thanks,
Rich

Have you checked the coolant temp sensor on the driver's side head? Usually when it fails the PCM thinks the engine is warm.

Ah, good thought. But when I connect the scan tool the PCM's water temp starts at ambient and climbs with the dash gauge. So I think it's reading correctly.

Rich