90 crx zc swap, few questions w/pics

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Old Dec 24, 2009 | 08:51 PM
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M8CrxSiA7's Avatar
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Default 90 crx zc swap, few questions w/pics

hey, hope everyone is enjoying the holidays, just finished up with a zc swap the other day and everything went well and didnt take that long. everything is hooked up and ready to go but the car wont start, it tries but i get nothing, no spark in any of the plugs and i cant hear the fuel pump, the car does have an expensive alarm in it and i believe it might be the alarm getting in the way of things and i tried to turn it off but still nothing. i dont think i ever actually turned it off, there were tons of wires down there. i dont know much about the alarm or alarms in general so any help would be appreciated. One thing i didnt do is have the hand brake up and i forgot most alarms need that to be engaged. so ill try that, any general info would help, and if maybe there is a common problem(s) about swapping the zc that i dont know about then please let me know, ive read and dont think i missed much. ill post some pics later too. thanks in advance
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Old Dec 24, 2009 | 09:10 PM
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M8CrxSiA7's Avatar
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Default Re: 90 crx zc swap, few questions w/pics

Here is a pic or two of the engine, never had a zc before and i dont know if its sohc or dohc, i heard you can tell from the vc? if anyone knows please let me know the specs on the engine..



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Old Dec 24, 2009 | 09:14 PM
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scottmog's Avatar
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Default Re: 90 crx zc swap, few questions w/pics

Its a single cam. Pretty much everything from a normal crx si engine is swappable.
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Old Dec 24, 2009 | 10:17 PM
  #4  
M8CrxSiA7's Avatar
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Default Re: 90 crx zc swap, few questions w/pics

ok, how did u know? vc? wat are the specs on the single cam?
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Old Dec 24, 2009 | 10:21 PM
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Deetz's Avatar
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Default Re: 90 crx zc swap, few questions w/pics

A sohc zc engine is exactly the same as a usdm Si engine with only a different cam, that's it!
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Old Dec 24, 2009 | 10:25 PM
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Default Re: 90 crx zc swap, few questions w/pics

one cam or two cams?? can tell by vc, try to search sohc zc and dohc zc
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Old Dec 24, 2009 | 11:59 PM
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Default Re: 90 crx zc swap, few questions w/pics

this is what a DOHC ZC looks like, notice the valve cover covers 2 cams and there are 2 cam gears


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Old Dec 25, 2009 | 07:56 AM
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Default Re: 90 crx zc swap, few questions w/pics

makes sense.. hopefully i can get it running now to see how it performs over the a6, probably not a great difference. im thinking the distributor is bad maybe and im still trying to figure out this alarm. i think even if the fuel pump is bad id still get some spark, not sure
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Old Dec 25, 2009 | 10:51 AM
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Default Re: 90 crx zc swap, few questions w/pics

No spark and no fuel pump priming sounds like a possible main relay issue. Find a wiring diagram and a DVOM. Learn to read the schematic and then start exploring your wiring system to find out a which components are getting voltage and which are not. Trace it back to the source of the problem, repair it.. Then be better off for the experience..
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Old Dec 25, 2009 | 11:47 AM
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BiG ChOr!Zo's Avatar
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Default Re: 90 crx zc swap, few questions w/pics

where did you pick up that clean looking zc motor from...!!!
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Old Dec 25, 2009 | 09:31 PM
  #11  
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From: Cincinnati
Default Re: 90 crx zc swap, few questions w/pics

main relay? i didnt mess with the car today, ill get to it tomorrow, ill check it out.
Yea the engine was cleaned and painted, wish i could afford the tranny too, then the bay would have looked real clean especially after i delete the ac and paint the Vc.. whats a good deal you think for a zc non vtec sohc like the one i have?
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Old Dec 26, 2009 | 05:29 AM
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Default Re: 90 crx zc swap, few questions w/pics

i got a stock dohc zc engine but has the 22mm snout crank instead of the commonly 24mm snout. had to swap cranks over from my high performance zc to get a timing crank pully on.. just gotta replace any stock d series crank and it will run. has 40k miles on it.. normal price for that is 300.. not inc. shipping
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