how to wire ecu for lsvtec crx?

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Old May 15, 2004 | 02:48 AM
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h22-cx-guy's Avatar
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Default how to wire ecu for lsvtec crx?

i got a problem, i just started a new project for my crx. i got a 94 ls block with a 95 gsr head. im planning to swap into a 90' crx hf for my drag ride. what im wondering is that what ecu should i run for my car? ive read a pr3 is good, but ive also been told to convert into obd1 and also heard that hondata will work. well, i am very confused to which one will work best for my dragster. ive done plenty of swaps into EGs, so i know the basics of swapping motors. but im new to the EF and would like some insight on my new project. thanks
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Old May 15, 2004 | 09:08 AM
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Default Re: how to wire ecu for lsvtec crx? (h22-cx-guy)

you can go either way, obd0 or obd1, but generally obd1 has more options.

Personally, I'd go obd1., but I have a friend running an ls-vtec with a custom chipped pr3 obd0 and it runs great day in and day out.


I'm sure others can help point you in the right direction
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Old May 15, 2004 | 09:21 AM
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Default Re: how to wire ecu for lsvtec crx? (Mr_CRX)

Just change to ODB1, and run the P72 ECU, take advantage of the IAB...
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Old May 15, 2004 | 11:30 AM
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h22-cx-guy's Avatar
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Default Re: how to wire ecu for lsvtec crx? (I3ackfire)

to change into obd1, i must change the entire wireharness right? i mean the one in the engine bay and the one in the interior?
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Old May 15, 2004 | 11:40 AM
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Default Re: how to wire ecu for lsvtec crx? (I3ackfire)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I3ackfire &raquo;</TD></TR><TR><TD CLASS="quote">Just change to ODB1, and run the P72 ECU, take advantage of the IAB...</TD></TR></TABLE>

do this! Changing to obd1.. some1 on here has a obd0 to obd1 conversion harness, might want to look into that!
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Old May 15, 2004 | 01:05 PM
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Default Re: how to wire ecu for lsvtec crx? (h22-cx-guy)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22-cx-guy &raquo;</TD></TR><TR><TD CLASS="quote">to change into obd1, i must change the entire wireharness right? i mean the one in the engine bay and the one in the interior?</TD></TR></TABLE>

no, you just need a conversion harness. You plug your harness (the one that usually goes into the ECU) into the harness, and then plug the other end of the conversion harness into your new obd1 ecu. Wire up a couple extra wires for vtec, some sensors, and the new obd1 distributor.

You can even run obd0 fuel injectors if you use the resistor box. Or, you can run the obd1 injectors and eliminate the resistor box.

Blown90Hatch (I believe that's his H-T name) has all the details and has given support to all kinds of people. I havent specifically dealt with him, but I have seen him go way out of his way to help people with their obd-conversions.

Hope that helps.
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