Hondata

I have a completely stock 2004 RSX-S. It has surging problems near the VTEC switch point. It throws "random misfire" codes.

I checked a few obvious things: fuel pressure, fuel filter, spark plugs, injectors. No luck finding anything wrong. The engine is mechanically in great shape: only 12000 miles of use. (not under warranty, long story). I became convinced that I had a faulty map.

I bought a KPRO on ebay and have been experimenting. I tried the K20a2-rsx-stock.kal and found that I had the same surging. I modified that map to reduce the switch point lower boundary by 400 rpm, and the upper boundary raised to 6200 RPM and 25 kPa. This seems to eliminate the problem.

I'd like to try the K20a2-rsx-stock-tuned.kal... Here's my question, finally: What is the "stock-tuned" map designed for? Is this the #4 reflash that I hear about? Is it designed for power? Economy? Overall drivability?

Thanks, Cap

The 'stock-tuned' calibration a dyno tuned for a stock engine. It similar, but not the same as the #4 reflash. It was tuned for power. Economy is pretty much non-adjustable as the engine has to run at stoichiometric for the cat.

[quote="Hondata"]It similar, but not the same as the #4 reflash. [/quote]

Thanks for the response.

I was asking about the #4 (or #2, for that matter) because I'm trying to get the most bang for the buck. Once I establish that the stock-tuned kal will work, I can save a few bucks buy selling the KPRO to somebody who needs it more than me, and sending my stock ECU to you for a reflash.

So, assuming that the stock-tuned calibration solves my problem, would it be possible to have my ECU reflashed with that same configuration?

Thanks again,

Cap

You can't transfer a calibration to a reflash. If the car is all stock, can you take it to the dealer? Otherwise get the car dyno tuned and keep the kpro.