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Old 08-24-2016, 04:09 PM   #33 (permalink)
darcane
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Quote:
Originally Posted by CappAttack View Post
Update: it seems that the D17A1 engine didn't have an EGR system on motors built 2002 or earlier. What seems likely then is that when this motor was replaced about 40k miles ago that I got a 2003 or newer D17A1 that have the EGR system included. However, the wiring harness and ecu (that's the computer, right?) We're never replaced to support the new motor. Hence my lack of error codes.

Is it worth the trouble to replace both the engine harness and the ecu?
I would say no.

Replacing the CPU is a little trickier on these cars because there is a separate device called an immobilizer that prevents starting up the car unless the correct key is present. The CPU needs to be programmed to match your key instead of the key to the car the CPU was pulled from.
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