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Engine Codes and VTEC-E Confusion

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Old 10-27-2002
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Engine Codes and VTEC-E Confusion

Just an FYI for everyone out there. Seems to be the general consensus that the EX comes with VTEC and the HX comes with VTEC-E. To set the record straight they're both the same. The HX merely adds the ability to lean-burn...which is why it has an A/F Ratio sensor (like the Si & RSX).

The VTEC in the EX is also VTEC-E. Here ya go:

2002 Honda Civic DX: 1.7L SOHC 16-valve I4 ULEV-certified engine (D17A1)
2002 Honda Civic LX: 1.7L SOHC 16-valve I4 ULEV-certified engine (D17A1)
2002 Honda Civic EX: 1.7L SOHC VTEC-E 16-valve I4 ULEV-certified engine (D17A2)
2002 Honda Civic HX: 1.7L SOHC VTEC-E "Lean Burn" 16-valve I4 ULEV-certified engine (D17A6)
Old 10-27-2002
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If the HX has the a A/F sensor as the Si and RSX, can it be tweaked to perform better or overridden at least.
Old 10-27-2002
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I was thinking the same thing actually. If we could get a competent chip programmer to do it then I'd say yes, but it's doubtful that will ever happen. No one buys an HX to "go fast".
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Well, guess who did. I got it a good deal from a dealership w/ 12k miles on it. Only $10,800. I thought I was getting a deal.
Old 10-27-2002
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I have an HX also...you get the 5-speed or CVT?
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5-speed.
Old 10-27-2002
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Good, you can add power adders to the HX 5-speed w/o worry. CVTs need to be beefed up to handle higher output. There's a couple members here that have added I/H/E and nitrous with good results.
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Quote
[hr]Originally posted by: PESTLNC
Just an FYI for everyone out there. Seems to be the general consensus that the EX comes with VTEC and the HX comes with VTEC-E. To set the record straight they're both the same. The HX merely adds the ability to lean-burn...which is why it has an A/F Ratio sensor (like the Si & RSX).

The VTEC in the EX is also VTEC-E. Here ya go:

2002 Honda Civic DX: 1.7L SOHC 16-valve I4 ULEV-certified engine (D17A1)
2002 Honda Civic LX: 1.7L SOHC 16-valve I4 ULEV-certified engine (D17A1)
2002 Honda Civic EX: 1.7L SOHC VTEC-E 16-valve I4 ULEV-certified engine (D17A2)
2002 Honda Civic HX: 1.7L SOHC VTEC-E "Lean Burn" 16-valve I4 ULEV-certified engine (D17A6)[hr]
Every car has an A/F ratio sensor (primary O2 sensor). It's just that the 7th gen HX uses the same part and relay as the RSX.
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Hmmm, I was under the impression that the HX had either an additional one or knock sensor. I could be wrong. I'm trying to learn as much as possible about the lean-burn system, and it just seemed obvious to me that Honda would use something to prevent predetonation from leaning it out too much.
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