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Discussion Starter #1
My Pfinder is 2003 model. I changed the engine with 2002 model engine and it runs smoothly for 1 week. My mechanic corrupted the ecu trying to fix a problem in the gear and I changed it. The old ecu has number 2B while the one I put now is 4H. The Airconditioner has refused to work. The engine will not start until after two to three cranking attempts.

Can some one tell me what to do next please. I may run crazy if I don't get help from folks here
 

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One can only guess from a distance. Things need to be tested and error codes need to be pulled at the very least.
 
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