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Forum: General Fuel Topics

04-17-2012, 02:15 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Sorry for the long time period between posts, but things here have changed. My wife decided she wanted a newer vehicle, so I put the swap on hold after gathering almost all of the necessary parts. ...

Forum: General Fuel Topics

11-17-2011, 01:27 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Yes, if we were talking about any other Civic from 96-00 you'd be right.

But the HX didn't switch to OBD2b like all the rest - it stayed OBD2a right through 2000. You can find verification of...

Forum: General Fuel Topics

10-21-2011, 01:11 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

A few more parts gathered:

1. An ECU from a 97 HX Fed emissions 5-spd:

https://www.fuelly.com/attachments/forum/photobucket/img_166349_0_5851b7e3288b695d6830713c0c59f714.jpg

2. The '97 ECU...

Forum: General Fuel Topics

10-14-2011, 01:08 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Here are some pics to illustrate EX/HX differences.

1. The EX (D16Y8) engine compartment.

https://www.fuelly.com/attachments/forum/photobucket/img_166259_0_50e0d46c215b9910ba3bacdb916a1e58.jpg
...

Forum: General Fuel Topics

10-14-2011, 09:21 AM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Further HX transmission information:

An HX 5-speed trans can also be identified by the partial VIN tag riveted to the front face of the transmission. If you have already located the "B000"...

Forum: General Fuel Topics

10-13-2011, 06:05 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Sounds like I need to check the EGR passages in my HX - 190k miles. I'll clean the ones out on this donor engine for the EX also. I run non-ethanol gas and syn eng oil as well. Our 97 EX doesn't...

Forum: General Fuel Topics

10-13-2011, 02:14 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Sorry, I see the 51 mpg under your name so disregard answering the mpg question. But I would still be interested to know how the EX exhaust swap affected your car.

Forum: General Fuel Topics

10-13-2011, 02:11 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Mike, did you notice a change in fuel mileage or lean-burn when you did this? What fuel mileage averages are you getting? I assume you made an extension for the O2 sensor harness?

I've thought...

Forum: General Fuel Topics

10-12-2011, 01:32 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

ADDITIONAL HX parts:

9. Intake manifold, to mount the EGR valve.

10. Head parts, including cams, roller rockers, etc.

11. The HX exhaust manifold is the same as the DX, CX, and LX. The EX's...

Forum: General Fuel Topics

10-12-2011, 01:27 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

Re: 97 Civic EX to HX conversion

Here is some pertinent info I've gathered. I realize some is common knowledge, so just skip over it if you already know it.

1. The HX uses a wideband oxygen sensor, with 5 wires instead of 4. ...

Forum: General Fuel Topics

10-12-2011, 12:50 PM

Replies: 17

97 Civic EX to HX conversion

Views: 26,568

Posted By jbi

97 Civic EX to HX conversion

I'm going to convert my wife's EX with D16Y8 to a lean-burn D16Y5, and thought someone might eventually find this helpful. I do have pictures, and will include them in this thread as I get it going....

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