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Before Tunning

Old 08-06-2007, 05:49 AM
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Join Date: Jul 2007
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Default Before Tunning

Ppl I need some help to find out what ECU do I have
Well Iíve done a DOHC ZC swap in my 89 CRX the original motor was a D16Z5
Iíve got a ZC motor with a PM7 ECU. I done a lot of searching trying to find out what kind of ECU that I have but all my founds shows a PM7 with different electronics components inside the ECU. Well all are a PM7 but there is a different in the last four digits like in PGMI page the ECU there is a PM7-E040, and a found other one with PM7-X030 the one which I have is a PM7-0000.
So Iím wondering what the difference between all of these ECUs is. I believe if the electronics board are difference it also means the wirring diagram also will be different like there will be a variation between all of them
Please some one take a look to my ECU and tell me which ECU it is and where can I find a wiring diagram for it
As far for my swap, the car is running and I went for a driving test but when starting the car it run very rich and you can here the sound from a mile
I got a wiring diagram from some one, the only thing that I could not found in my car is the IMA (idle Mixture Adjuster) sensor, do I really need this sensor, and if yes could some one show me a pic of it so I can go and search for it because I never seen one before


The Wiring Diagram I got
ZCRXO is offline  
Old 08-06-2007, 11:39 PM
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Join Date: Jul 2003
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Default Re: Before Tunning

Thats a regular old OBD0 PM7 ECU...same basic pinout as a PM6/PR4...and its even chippable, bonus
Chris Harris is offline  
Old 08-07-2007, 04:00 AM
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Default Re: Before Tunning

thanks xenocron for your reply, you r the best

so all what i have to do is just get a pinout of a PM6 or PR4 and hock it up
whats about my idle problem
i have followed the wiring diagram that i attached and i found it matching with my car wiring except for the IMA sensor, could it be the reason of my problem
please advice
ZCRXO is offline  
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