1998 Vette Fuel Trim Issues

[Dynomike357]

Looking for some info, I have customers car that we did a heads cam package in, tuned it with HP Tuners and after all the work I seem to have a very strange issue. The fuel trims go complete opposite in correction. Bank one will go to -30 and bank 2 goes to +30, like the O2's are on the wrong side. They aren't, I switched them and the issue is still there. The only way I can make the car not remove and add the fuel it turn off long term fuel correction. Check all wiring and even switched ECU's. Any idea's?

 

[Hib Halverson]

Ok.
Bank one is way rich and bank two is way lean. You've checked wiring/connections, swapped the O2Ses and swapped controllers and the problem still exists.

Any chance you have the injector connectors mixed up or the injector harness miswired?

Also, while we're on the subject of injectors, if you're calibrating a cam/heads package, did you pull the injectors and have them flow tested and cleaned if necessary?

Finally, how'd the engine run when you turned off LTFT and what were the O2S voltages when you did that?