Hi all, working with a 1992 Pontiac Bonne - was originally an L27 NA car, has been converted to the L67 Supercharged engine.

L27 uses a 16141470 PCM with $5B4
L67 uses a 16141470 PCM with $5B4

The vehicle starts and runs with L27 Prom AXAZ - Tech1 says VATS YES

I have a memcal here from a L67 car - BCFN - swapped it over and says Tech1 says VATS NO - Cuts out within 2 seconds

I copied BCFN to the computer and edited it with Tunerpro to unselect VATS.

Same issue - Cranks, Starts, Stalls immediately - VATS NO

Strange as the wiring diagrams are identical for the VATS (PassKey) system. I have checked both 1992, 1993 and 1994 wiring diagrams and there are no differences when it comes to the VATS fuel enable signal. Even with VATS enabled in the stock memcal it should have ran!

As a test I burnt AXAZ on the BCFN memcal and it ran no issues.

HELP!?

Thanks all!

Dan