Turbo Car Wont Idle on 2nd Start Up of the day

[lower_the_dynamite]

Tune is attached for review and appreciate the help in advance.

I have had this issue for over a year and I'm out of ideas on what to look for. Details on the car/issue below.

99 TA- 370, 4l80e, BW S480, True Bosch 210's, Dual Walbro 450's, 3 bar map on SD, e85, BR7EF's at .22, Stock TB with ls6 intake HP Tuners. Made 830rwhp on 24lbs 16 degrees. Tune by Matt at Sloppy.

If I start the car for the first time, whether is 90 or 40 degrees outside, the car will run and idle perfectly. I have driven the car from 5 minutes and up 2 hours straight and the car runs, stops and idles perfectly every time I come to a stop. I have done this on 100 occasions with no issues.

If I was to drive for 5 minutes or up to 2 hours and I shut the car off for any reason, on the next start up, the idle wants to die immediately. The car runs great, comes to a stop great and as soon as it goes to 1 MPH to zero and I stop moving, It wants to die and I have to step on it from stalling.

When its warm and having issues, I try changing some settings in HPT, do a write config, it will start, drive and idle fine. As soon as I shut it off and turn it back on, it wont idle. I installed a new TPS sensor and completed the TPS reset and nothing different.

It is a little cold blooded cold but runs fine after 2 minutes or so. If anyone has heard of this off issue before, I would love to hear some ideas on what to look for.

[ryan_axberg]

can you post up a log also of it doing it and log iac position, tps, rpm, throttle follower, throttle cracker, mph, spark

[anniversaryss]

Mine does somthing very similar but except dying it will hamg idle.

I traced it down to throttle follower. The car wont continue idle sequence until follower/cracker decay out. It might also have to do with IAT heat soak.

For some reason it doesnt effect the car on first start. I load a tune almost every time so it could also have to deal some learning i dont know of.

Hope anything helps.

[lower_the_dynamite]

Will do guys. I will follow up with this tomorrow and appreciate the help.

[theone61636]

My car is doing something similar. I just started my SD tuning yesterday and anytime i load a new tune after making corrections to my VE table the car wont stay running. I end up having to reload the base tune, plug in the MAF and start the car that way. After i get it running again with the MAF tune, I can reload the SD tune and it will now start and run until i make the next set of corrections. Very strange.