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Old 03-25-2014, 01:29 PM   #3 (permalink)
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Join Date: Feb 2012
Location: Missouri
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Lean and Mean - '98 Honda Civic HX
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Your theory about changing the ECU because of the O2 sensor problem is solid as I experienced that same issue. But a more likely explanation of the non-stock ECU is that they did a "mini-me" swap. This is where you swap on a D16Z6 VTEC head. That also explains why they changed the ECU, probably to the P28 from the D16Z6 cars.

The way to tell is to look at the stamp on the head. If it says P07-1, it's a VX VTEC-E head.

The transmission would be stamped P20/A000, but that doens't confirm it is a VX. The DX/LX also had the same marking. The only way to easily tell would be to take a test drive. My VX tranny runs at around 2000 RPM at 60 mph.

I would still consider buying it for the right price if the head/transmission have been swapped. Especially if there is no rust or body damage. 92-95 Civic hatchbacks with good bodies are gold in the Honda world.
1998 Honda Civic HX - My Project Thread

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