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Old 07-24-2013, 03:19 PM   #1 (permalink)
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Default D16a8 ecu questions

Hi guys, ive done a bit of searching around the forums for the past day or 2 and cant seem to find anything conclusive. I have a d16a8 in my 91 crx si, and i was wondering if i would see any improvement by using a pm7 ecu that came with the japanese ZC instead of the pp5 or p29 that came with the a8. thanks
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Old 07-24-2013, 11:24 PM   #2 (permalink)
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Are you running OBD0 or OBD1?
To change between OBD0 and OBD1 some part swapping is required.

The list goes somewhat like this depending wether you have Rover engines in the list or not. (minor exceptions might occur)

88-93 D16A8 is OBD0 with a catalytic converter and lambda sensor running running PP5 ecu
91-95 D16A8 is OBD1 with a catalytic converter and lambda sensor running P29 ecu
88-89 D16A9 is OBD0 without catalytic converter and lambda sensor running PM7 ecu +IMA
91-95 D16A9 is OBD1 without a catalytic converter but with a lambda sensor running P29 ecu
89-92 D16Z5 is OBD0 with a catalytic converter and lambda sensor running PM7 ecu
88-89 ZC DOHC is OBD0 without catalytic converter and lambda sensor running PM7 ecu+IMA
90-91 ZC DOHC is OBD0 with a catalytic converter and lambda sensor running PM7 ecu
92-95 ZC DOHC is OBD1 with a catalytic converter and lambda sensor running P29 ecu
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Old 07-25-2013, 04:14 AM   #3 (permalink)
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No, unless you can find an EDM PM7.
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Old 07-25-2013, 05:43 AM   #4 (permalink)
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Is there any way to tell that its EDM?
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Old 07-25-2013, 06:49 AM   #5 (permalink)
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So an educated guess is that you have OBD0 and want to stay OBD0.
I can take a look at my shelf and give few pointers which are EDM PM7 ecus.


Last edited by lex; 07-25-2013 at 07:01 AM. Reason: Added picture
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Old 07-25-2013, 08:19 AM   #6 (permalink)
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there is currently a pm6 in the car, is that the cars (91 crx si) stock ecu?
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Old 07-25-2013, 08:23 AM   #7 (permalink)
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Quote:
Originally Posted by benny View Post
there is currently a pm6 in the car, is that the cars (91 crx si) stock ecu?
Yes that is the stock one.

ANY PM7 will make it run better then the PM6. Like Beave said, EDM PM7 is best.
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Old 07-25-2013, 08:25 AM   #8 (permalink)
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pm6 is meant to run the d16a6, it will work but a PM7 is better.

EDIT: dammit rico! beat me to it.
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Old 07-25-2013, 08:34 AM   #9 (permalink)
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thanks guys, much appreciated.
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Old 07-25-2013, 10:47 AM   #10 (permalink)
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A chipped ECU will run it even better that anything else OEM.

I just wanted to state that for the record.
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Old 07-25-2013, 02:41 PM   #11 (permalink)
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so what should i look for in a chipped ecu then? and what kind of improvement would be a realistic expectation?
and if i switch to the pm7 will i need to run wires from the cylinder position sensor to the ecu? or will it be good if i already have the cps wired to the car

Last edited by benny; 07-25-2013 at 02:57 PM.
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Old 07-25-2013, 04:41 PM   #12 (permalink)
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*blinks*

I have no idea what you are talking about with the CPS.

A chipped ECU allows you to tune the car. You can expect better driveability, lower fuel consumption and more power, especially if you have your basic mods done to the engine.
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Old 10-28-2013, 12:49 PM   #13 (permalink)
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and can you say me how can i solve code 11 IMO sensor, where can I wire it do any of you have that pinouts?
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Old 10-28-2013, 04:08 PM   #14 (permalink)
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Quote:
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and can you say me how can i solve code 11 IMO sensor, where can I wire it do any of you have that pinouts?
code 11 (IMA sensor) is only found on the UK ECU for engines without an oxygen sensor and have an IMA sensor instead - the IMA sensor is on the ECU - does your ECU have this sensor (black thing in the picture)

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Old 10-29-2013, 04:50 AM   #15 (permalink)
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code 11 (IMA sensor) is only found on the EDM ECU for engines without an oxygen sensor and have an IMA sensor instead
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