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Discussion Starter · #1 ·
I have the ECU off a 86 9000 turbo. Would it work in my 88 900 turbo vert? I want to test it out and possibly keep it around as backup ECU just in case.
 

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try it out in the driveway, are the numbers on it the same??,
the 9000 box might be more complicated than your 900, but it might be only using 75% of what it was made for, as the 9000 might have more sensors /toys etc etc, so will do no harm
 

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25 pin ECUs are interchangeable to a certain extent.
It will run OK. You could lose some functions because it's an earlier box.
You can always put a later 25 pin box in an earlier car without a problem, you can often put an early box in a later car and get away with it.
 

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One difference is between MY89 cars which use a plastic-bodied AMM and all other 900s which use metal-bodied AMMs. The pin-outs for the plastic AMM are different.

We fitted a MY88 ECU to a MY89 car and re-arranged the wires on the AMM end of the loom and the car ran better than it ever had done.
http://www.saabcentral.com/forums/showthread.php?t=41345

Might be different in markets other than the UK - I don't know.

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Matthew said:
One difference is between MY89 cars which use a plastic-bodied AMM and all other 900s which use metal-bodied AMMs. The pin-outs for the plastic AMM are different.

We fitted a MY88 ECU to a MY89 car and re-arranged the wires on the AMM end of the loom and the car ran better than it ever had done.
http://www.saabcentral.com/forums/showthread.php?t=41345

Might be different in markets other than the UK - I don't know.
Yep my 89 16V car has a plastic-bodied -013 AMM. I haven't looked closely enough behind the carpet under the drivers side (RHD!) of the dash to see what the part number on the box is. Are the plastic-bodied AMM's prone to problems more than the metal-bodied ones? Seems the 89 cars are a bit 'experimental' as they also have the hall sensor on the engine behind the crank pulley, which ironically gives a more accurate signal than a distributor-mounted hall sensor. The price is of course the environment that behind-pulley sensor lives in. :cool:

Craig.
 

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Matthew said:
One difference is between MY89 cars which use a plastic-bodied AMM and all other 900s which use metal-bodied AMMs. The pin-outs for the plastic AMM are different.
And they use 35 pin ECUs instead of the 25 pin.
 

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Discussion Starter · #10 ·
All I know about the 013 AMMs is that I am using one in my LH 2.4 Volvo right now. It seems to be happy with it. :cheesy:

Anywhoo, I will try the 9000 ECU in my 900 and see what happens.
 

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Discussion Starter · #11 ·
Ok, I am running the 9000 ECU right now. I think it is still too early for me to figure out what is the difference between it and the 900 ECU. I may need to find someone who knows the Saabs a bit more to find any issues.
 
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