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Discussion Starter · #1 ·
One of my buddies has his 06 Tundra at our shop. We got a 4.7 from Toyota Heaven here in Dallas that the owner said was out of an 06 tundra.

It came with a harness, everything installed fine and hooked up fine but when he turned the key the engine did not crank.

So he swapped the harness from his original engine to the engine he swapped in. Same result, it does not crank at all.

The engine looks the same, intake is plastic, yada yada. We installed a new battery and tested the electrical system and everything is good. Checked the neutral safety switch, all good. When we hotwired the starter it turns over fine.

Any ideas? Suggestions?

How can we tell the year of the motor he purchased from Toyota Heaven?
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