How does the ROM tune work on the ECU?

[mopwer]

Is it like an onboard SAFC or does it also control timing? Just currious.

Greg

[SPOOL U]

Originally Posted by mopwer

Is it like an onboard SAFC or does it also control timing? Just currious.

Greg

It's like a reflash. It controls any maps that are stored in the ECU's memory. It's not a piggyback. And yes, it controls timing.

[mopwer]

Originally Posted by SPOOL U

It's like a reflash. It controls any maps that are stored in the ECU's memory. It's not a piggyback. And yes, it controls timing.

Good stuff! So it is better than a piggy back. Thanks.

Greg