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1990 civic/crx si jdm DOHC ZC engine swap

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Old Jul 29, 2012 | 11:14 PM
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Default 1990 civic/crx si jdm DOHC ZC engine swap

I just swapped in a DOHC ZC into my 92 civic hatch everything is hooked up but falls on its face when you rev it hard, but if you slowly push the gas it runs fine. any help would be appreciated
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Old Jul 29, 2012 | 11:46 PM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

Have you got the TPS and MAP plugs around the right way? they both have the same plugs...
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Old Jul 30, 2012 | 12:08 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

im not throwing any codes. check engine light is not on
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Old Jul 30, 2012 | 12:15 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

It may not throw codes as they both use the same voltage. Codes should pop up when the sensors measure out side of their parameters , in this case that may not happen. Are you using a JDM ZC ecu for a EG civic?
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Old Jul 30, 2012 | 12:19 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

im using a po6 im not sure if its chipped for the engine. i got the full swap for free. the guy didnt know wat was done to the engine but i tore it apart and found out its fully built with srp pistons, eagle rods, stage 3 spec racing clutch, arp full bolt set, a header, obd0 ecu, obd1 ecu, obd0 wire harnest, obd1 wire harnest.
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Old Jul 30, 2012 | 12:27 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

You need a OBD1 JDM P29 ecu to run it stock. Try the TPS and MAP plugs as they can be placed on the wrong sensors accidentally. If that doesnt work then maybe you need a ecu tune.
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Old Jul 30, 2012 | 12:29 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

ill try it i just dont have the money to chip the po6 n cant find the p29 in missouri cuz im the only one here that has a zc engine well atleast the DOHC pm7 engine.
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Old Jul 30, 2012 | 12:30 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

im probly just gonna sell the engine and put a Z6 back in it.
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Old Jul 30, 2012 | 12:34 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

Yea there is so much more parts around for sohc's
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Old Jul 30, 2012 | 12:37 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

yea i found that out after i sold my built turboed Z6 lol. when i got the engine i called around to all the tuner shops here n they all told me the same thing (we have never worked on a DOHC ZC).
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Old Jul 30, 2012 | 12:57 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

I have a P29 ecu from a JDM EG but im half a world away so i dont think that wil help too much.
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Old Jul 30, 2012 | 12:59 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

hahaha yea.
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Old Jul 30, 2012 | 01:09 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

I think i even have a OBD0 PM7 EF ZC ecu somewhere here.
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Old Jul 30, 2012 | 01:50 AM
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Default Re: 1990 civic/crx si jdm DOHC ZC engine swap

i have the same ecu at my house.
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