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S4/S5/FD ECU/harness compatibility

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Old Aug 24, 2004 | 07:40 AM
  #1  
eyecandy's Avatar
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S4/S5/FD ECU/harness compatibility

Is it possible to use a S4 harness (engine) or ecu in a S5 car or vice versa? Or can you use a S4 engine harness with a S5 euc? I know this is a stretch and I know the Harness connector will need to be modified/rewired.

My other question is if you are running an FD UIM can you still use the stock ECU, because of teh FD TPS you need to use?

I also know if you want to run a PFC in an FC you can use the FD UIM, and you have to use an FD pressure sensor, so does that mean you could use an FD ECU? I guess as long as you could connect the harness and ecu right?
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Old Aug 24, 2004 | 08:33 AM
  #2  
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no the s5 and s4 have 2 difernt timings or something like that i beilve the s5 has a difernt e shaft or some thing? dunno but all i know is that its not worth the agravation of splising wires if it even is possible and if it isnt then....well it isnt

sorry i dunnno if that helped but i seriously dought if you can
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Old Aug 24, 2004 | 01:29 PM
  #3  
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From: n
Originally Posted by eyecandy
Is it possible to use a S4 harness (engine) or ecu in a S5 car or vice versa? Or can you use a S4 engine harness with a S5 euc? I know this is a stretch and I know the Harness connector will need to be modified/rewired.
No, the plugs are not compatible.


My other question is if you are running an FD UIM can you still use the stock ECU, because of teh FD TPS you need to use?
Possibly...

I also know if you want to run a PFC in an FC you can use the FD UIM, and you have to use an FD pressure sensor, so does that mean you could use an FD ECU? I guess as long as you could connect the harness and ecu right?
I doubt this would work correctly.
The Power FC is mapped for the 13B-REW.
Unless you have the master program and change the base map, there is no guarantee it'll work on an FC.

I don't know why you insist on using the P-FC.
There are a lot of other options that are priced competitively with the P-FC with more flexibility.


-Ted
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Old Aug 24, 2004 | 03:45 PM
  #4  
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From: san francisco
I have an AP Engineering PowerFC for FC, works like a charm, fired up first time. Uses FD pressure sensor. I sold my FC so its just sitting in a box though.

When you fire it up, it says 13BT instead of 13BREW btw.
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