Correct it should do.
I would get it checked out. ESL are good but with the few I mapped I did have a couple of issues early on..
I know the 97/98 was in development for years, so there could be a gremlin in there or an issue with their oversea's manufacture quality.
I would offer to help but the ESL cable dongle I have only supports the 93-96 ECU's.
Is there a link/jumper on the base board you could join/fit to revert back to running the OE onboard base map, then refit the MAF and try. That's if the ESL adaptor hasn't damaged the main board.
I think you need to talk to Dunc's
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