Or just make sure you get the direct injector driver from the new engine.
It's bolted to the engine after all for this exact reason.
Quote:
Originally Posted by Spartarus
Match the IDU, per cylinder.
The IDU calid has to match the ECU calid. The flow number for each injector for each cylinder is programmed in the IDU.
Your old ECU stays in the car (it's hidden in the passenger footwell) therefore your old IDU has to go on the new engine.
In order for the IDU to operate the injectors correctly, the flow number in each cylinder has to match. The easiest way to ensure this is to swap them over, but you have to pull them anyway to check the number.
When you buy a new engine you'll have 8 direct injectors total. So, pull the old ones, write down number and cylinder, and pull the new ones.
If they match, you wasted your time, but there are 4 numbers and 4 cylinders which means there's a 1 in 256 chance that the combo matches.
So, you want the engine to start and run... It's only logical to pull them all and ensure you have the correct number in the correct cylinder on your new engine.
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