mastercoryd

Hey guys, I have a 2001 C5 and I removed my intake to put the FAST 90mm on and I got a deal on a used ls2 tb with the casper harness. Well I finished at 2 am in rush to get ready for the drag strip, drove 2 hours there and noticed that soon as I hit full throttle the car would go into "REDUCED ENGINE POWER" mode and SERVICE TRACTION SYSTEM and SERVICE ACTIVE HANDLING would go on. Soon as I turned my car off and back on it would be fine. Until of course, i hit full throttle. We hooked it up to EFI live and came up with p1516 which is the throttle actuator control or whatever it was. So, I'm trying to figure out if its a ****** ls2 throttle body that I got or if its the casper wiring harness thats messed up. According to EFI live the car goes into reduced engine mode with anything over 84% throttle, even if the car is off. Which makes me think it probably isnt a tuning issue due to increased air flow.

PS before I get flamed, I did look up this code and common problems online for a while, seen a lot of similar problems, but no sollution yet.

0tom01ss

you have to change the tbs settings if your going from a 78mm to a 90mm . if not you get reduced engine power b/c it falls out of the maps range. retune the parameters and you should be ok.

The Highlander

Is it the silver blade or bronze blade?

mastercoryd

I think bronze, apparently the blade opened up the opposite way of my friends gto

The Highlander

What tuning software are you using? If you send me your pcm ill fix it

mastercoryd

Efi live, my buddy was checking everything... We think its a t.b issue because with the car off it still sets off the reduced engine power?!

The Highlander

It is not a tb issue! I canfix it! Send me your file! Send me a pm and ill solve all your issues with it!

mastercoryd

Pm'd you sir

Zip Corvettes

There are a bunch of tables that have to calibrated, you can't just bolt on those new items and go.

mastercoryd

I understand, but my biggest question is... Why the hell would the car go into limp mode with the car off, that doesn't sound tune related.. He said he tried adjusting some of the tables. Do you know what that could be? Almost seems more like a bad t.b/harness issue

0tom01ss

efi live tb tables c6101 and c6102 to start

C5Ryan

if it has a bronze blade it will not work. that is an ls3/ newer ls7 tb. I had the same problem when I originally bought an ls7 tb with a bronze blade. didnt matter what we did to the tune, wouldnt work. bought an ls2 tb with a silver blade and problem solved.

0Slowhawk

You have to make sure it's the right year TB.

Zip Corvettes

Not exactly a LS3 or LS7 TB, it is a 05-08 TB and a 09-13 TB. They have different electronics and are not interchangeable.

mobius

Yeha I believe LS2 will work and LS3 wont

littlefranks

i had a simular problem ,its the tune.i put a 102 mm without the harness,because with the ls2 and ls3 tb i was having problems,the tables have to be switched ,im not a tunner and we are still working on mine.drove it home tonight ,and i get service steering colum .but car runs like a raped ape.

Zip Corvettes

The silver blade TB electronics had 3 circuits in it for app, the gold color blade has two. They are not interchangable, does not matter what table they are trying to calibrate it will not work.

The Highlander

It works. I have done it more than 6x