Hondata

I have an S300/P28 combo.

Car was tuned by a Hondata dealer with an LS/VTEC running a turbo. Car made 490 whp, and ran very VERY smooth.

fast forward, I've pulled the engine and EVERYTHING that went with it, and swapped it into an identical chasis car. Plugged in the same S300 with the same tune.


Now, VTEC won't operate. It bogs down and hits a "rev limit" at VTEC threshold.

I dug around in the tuned map, and the secondary tables are disabled. This seems to be the same with the map that was e-mailed to me from the tuner.

Playing around, I enabled the secondary tables, and viola. VTEC works now, and the car pulls like it used too.

I have a feeling though, that something is wrong. Are the secondary tables REQUIRED for VTEC to function? I mean, does a tuner have to use them?

Secondary tables are not part of vtec. If VTEC is not working properly then you more than likely have a wiring problem somewhere. Just because it is a similar chassis does not mean that ther are no differences or that something could not have been damaged in teh process os swapping everything over.

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can you explain why the VTEC works properly if I enable the tables and change nothing else?


I would just run with them enabled, but my tuner didn't tune them. So I'm at some sort of risk. It doesn't make sense to me that the car runs properly with the secondary tables enabled, and not with them disabled.


I'm being plagued with a lot of the driveability problems that others are experiencing after the software update. Is there anyway to force the S300 to go back to an older version of the software?

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also, as for the wiring, when I swapped everything, I swapped everything. Including the wiring. I took the front half of the car, and put it on another car.