Results CCT, BUZZ etc - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 09-17-2013, 09:36 PM Thread Starter
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Results CCT, BUZZ etc

OK ran some tests heres the results:

checked engine cold
Key On Engine Off
Manifold absolute pressure: 12.6 psi
Oil temp matched ambient temp +/- 2

Checked for stored codes:
p0605 NO CEL ON

Key On Engine Off Tests

Buzz Pass

Key On Engine Running Tests


Key On Engine Running
Change Rotational Velocity PERDEL
3 2.3 avg
8 5.3 avg

All others read 0.0 to 0.2

Engine At Idle:
icp press 470-480 idle warm
icp duty 9.5 idle
Icp volts 0.85

WOT RUN 60MPH-90MPH 3rd Gear
ICP PSI Duty Cycle %
1865.50 15.5 Part Throttle
2762.62 20.3
2805.61 23.2
2779.59 24.1
2834.46 24.4
2832.19 24.8
2871.22 25.1
2924.40 25.3
2948.15 24.2
1528.38 16.6 Lift Off

Also noticed my Exaust Back Pressure PSI running 4-5psi higher than Manifold Absolute Pressure

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post #2 of 2 Old 09-17-2013, 10:24 PM
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What your problem with the truck? Your exhaust back pressure (EBP) and turbo boost are fine if your only 4-5 difference. Typically you wanna see a EBP/turbo (manifold) psi at 2/1 when spooled up. Some times the EBP can be higher until the turbo lights! Only other real problem (besides codes) I see is your IPR duty cycle % seems low. I thought 14% was normal at idle.

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