hey guys I just installed the LTCC swap kit on my 96 firebird formula. The first box I had ran great for two days but got moisture in the box. Once this happened the car started terribly misfiring and now 3 cylinders are dead. I had gotten a replacement box and when I plug it in it cranks but no start and I have 4 blinking red lights. I tried plugging in the old box and it runs except 3 cylinders are still dead. Anybody have any ideas?

 

4 blinks = a problem with the spark signal from the PCM. Check the white wire.

See page 5 LTCC of instructions.

https://www.camaroz28.com/forums/lt1...ctions-882760/

Checking white wire from PCM:

4th Gen LT1 F-body Tech Articles

 

We haven’t changed anything from the setup when we got the new box. None of the wires where touched. It runs with the crappy box, but not with the new one

 

Do you get 4 blinks on both boxes?

The white wire from the PCM is firing the ICM based on the low resolution pulse signal from the Opti. When the LLTC box suffered from water intrusion, did other parts of the engine as well?

When in doubt, contact Bob Bailey. May take a while for him to respond. Buddy of mine who’s reinventing my old Formula recently had a problem with a box and Bob solved the problem.

 

The other box runs and there are no flashing lights. I think the new box he sent me could be defective I’m not sure.