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Old 02-18-2009, 06:00 PM
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Name that sound!

a little background - buzz test is ok, cont. test ok, no codes. oil pressure ok, if not a bit high. the noise increases with RPM, until WOT where all you can hear is the turbo scream.

it's the most clear while standing at the drivers side mirror, but my #7 cylinder is low on compression (300)

call it what you will, knock, skip, miss, whatever.

(sorry for the dark video, just took it)

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Old 02-19-2009, 06:45 AM
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nobody??? should i take that as it sounds normal?
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Old 02-19-2009, 06:50 AM
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Sounds ok. Is that cold or up to temp?
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Old 02-19-2009, 06:51 AM
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Send a message via Yahoo to Dave
Sounds fairly normal. But with that low compression you do have an issue
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Old 02-19-2009, 07:02 AM
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that was driving the piss out of it after replacing the HPOP o-rings, so not fully up to temp, but close.
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Old 02-21-2009, 03:20 AM
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Have you checked the per/del numbers? I thought I heard a faint tick when you walked around to the front of the truck but nothing significant. I can't tell if its a ticking or fuel knock, I'd be concerned about the low cylinder though.
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Old 02-21-2009, 04:04 AM
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1. what are the per/del numbers
and
2. what would check them, a scanner, or the AE system?
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Old 02-21-2009, 04:49 AM
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Quote:
Originally Posted by Hawker View Post
1. what are the per/del numbers
and
2. what would check them, a scanner, or the AE system?
1. They are referred to as Change Rotational Velocity and I believe this refers to the percent of change in crankshaft rotational velocity after each injector fires, or another means of checking cylinder contribution.
2. I am not familiar with the Auto Enginuity system but I know a good scantool will show them while reading the data stream info.
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Old 02-21-2009, 05:34 AM
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Quote:
Originally Posted by Deeslfxr View Post
1. They are referred to as Change Rotational Velocity and I believe this refers to the percent of change in crankshaft rotational velocity after each injector fires, or another means of checking cylinder contribution.
2.
Quote:
I am not familiar with the Auto Enginuity system
but I know a good scantool will show them while reading the data stream info.
I just read another thread where they said A/E will show that data FYI.
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Old 02-21-2009, 09:50 PM
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broken TC i had a 99 7.3 psd did the same thing whent to ford they told me what it was did not belive it but it was the TC!!!!
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