Steve88

iTrader: (5)

I am having some cold start and warm start problems with my 2000 SS. The car has a 408 with TFS 225 heads and a big cam(255/264) with the normal supporting mods and a 4l80e with a Yank 3800 stall. The car is very cold natured on intial start and any throttle at all with cause the car to stall. It also has the same symptoms on a warm start but for a much shorter period of time. The car has a speed density tune done by ECS. The attached scan is of a cold start and with about one mintue of run time. I also attached a copy of tune if that would help diagnose the problem. I can take a scan of any other situation if needed.

jtotheizzo

Did the car ever start to run right in that log? The reason I ask is right at the end you can see it must go into closed loop. Your STFT starts climbing pretty quick, then you shut it down. I am wondering if your problem goes away once it adds more fuel. Without the wideband readings it difficult to see if you are actually lean. But from what you describe above it seems that once adaptive fuel controls take over the car runs fine.

For the record I am an amateur tuner but long time mechanic so I will let the experts help you I was just spit balling.

ATEURZO6

Can you email me or post up a longer scan....

IMO there are several things that dont look right just off hand air flow tables and why is most of your DTC's set to no error reported .... Some of those need to show an error!

Carlspencesfe@gmail.com

ctd

iTrader: (1)

Have you spoken with ECS?