Need some help with a H/C Trex LS1

[Tricked-Out-Toy]

Hey guys Im pretty new to HP tuners and ive held off posting until Ive tried just about everything I could find through searches... The engine is a forged LS1 stock cubes, Trex, PRC 2.5's, LS6 intake ported TB and 37lb injectors. It wont idle to save its like and feels like its only running on 7cyl below ~3k rpms. I have a tune thats from another car thats nearly identical that I used as a known good starting point and nothing I change seems to help... Im not gettign any codes. heres a scan and two of the tunes I tried. THANKS!

[ns158sl]

It might be running on 7 cylinders, lol. Check out bank 2, your fuel trims are going through the roof. The sensor isn't really switching so I would first check that out, or any air leaks, if thats seems to be alright, then I would try to see if you have a dead hole.

Eric

[Tricked-Out-Toy]

I checked for a dead cyl by firing it up for about 10 seconds and then feeling the headers and there all hot... Ya the O2 is getting swapped out tonight but I didnt think that would affect start up idle or anything before going closed loop?

[ns158sl]

Good call!, lol Your log isn't a start up log though. Does it idle better when it finally does go into closed loop or get worse?

[Tricked-Out-Toy]

No it idles like a dog ALL the time after you drive it and come back itll barely idle but it sounds like its only on 6-7cyl.. def missing. but at no time will it actually idle. Im pulling the plugs tonight to check and see if the faulty O2 has fouled out the plugs... thats about all I can think of on the engine side. a vacuum leak would cause it to idle up and seach and it isnt even doing that, it jsut falls falt on its face below about 6% throttle.

[Throttle]

pull valve covers and look for a rocker off!

[Tricked-Out-Toy]

Thanks....

I replaced the bad O2 and all the plugs (bank 2 was fouled pretty bad) it fired back up and it ran ALOT better. It still woldnt idle so I made the changes in the attached file. that got it to idle ok but theres a huge stumble on tip in and once you rev it up it wont drop back to idle itll stay reved up around 1500-1800rpms untill you drop it in gear and pull it back to neutral... the stumble on tip in is really bad... any ideas?

[Throttle]

look at your timing it has a huge dip ?in it and your idle spark advance seems odd too??Attachment 20570try using the idle spark advance off this one i would start over with the timing.