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2003 Mazda 6 3.0L engine replaced

Old Nov 4, 2014 | 09:22 PM
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apolloprince's Avatar
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Default 2003 Mazda 6 3.0L engine replaced

Hi guys, I need help
I recently had a mechanic replace the engine on my 2003 Mazda 6 6cyl 3.0L
He installed a 2006 engine with 66,000 miles on it. The car runs great but the only problem is that in the mornings the car has trouble starting. Once it starts the is no problem starting it again even after sitting at work for 8 to 9hrs. Is not the fuel pump as it has been check.
The mechanic seems to think that the new engine is not compatible with the ECM computer.
I don't know what to do, neither does the mechanic.
Any advise with helpful at this time.
Thanks
 
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