turbo spooling - Ford Powerstroke Diesel Forum

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post #1 of 5 Old 05-19-2008, 05:53 PM Thread Starter
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turbo spooling

This is my first turbo diesel, I drove an 7.3 normally asperated for 550000 miles. Can some one tell me if it is normal for a turbo to seem like it is not wanting to spoole down when the truck shifts into O.D. When this happens the egt's rise extremely fast unless I get off the throttle and let the turbo catch up. Is this normal?
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post #2 of 5 Old 05-19-2008, 05:57 PM
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When it shifts into O/D what does the tach gauge do. Does it go up or does it drop. I ask because if your egt's are going up and your rpms are going down then you have an engine problem. When the trans shifts into O/D and your rpms go up with your egt's then you have a trans problem.


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post #3 of 5 Old 05-19-2008, 06:00 PM Thread Starter
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There is not any transmission slipage
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post #4 of 5 Old 05-19-2008, 06:06 PM
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Originally Posted by Lee Morgan View Post
There is not any transmission slipage
it doesnt need to be slipping to have a problem could be somthin wrong with your acumulators
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post #5 of 5 Old 05-19-2008, 06:20 PM
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550,000 miles? or 55,000 miles?

EGTs will rise if you lug the motor in O/D, but will generally peak and fall as the boost catches up.

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