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2001 7.3 CCSB 4X4 2016 6.7 CCSB 4X4
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186 Posts
Discussion Starter #1
Hello all,

I have a 2001 7.3 with 230K miles on it. I rebuilt the backpressure valve assembly a couple years ago, new guts, seals etc and it has been working fine last winter. Now that is getting cool enough to start using it again I have noticed that after it kicks in for a minute or so it starts to pulse in and out as well as RPM hunt 50 to 100 RPM I can actually see the arm move in and out a very small amount.

I was just wondering if anyone has seen this, is it something that can be a telltale sign of a bigger problem.

Thanks all!!
 

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1,888 Posts
try cleaning the ebp tube/sensor. Located off p/s manifold in front, and runs to front of motor, below hpop.
 

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2001 7.3 CCSB 4X4 2016 6.7 CCSB 4X4
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186 Posts
Discussion Starter #4
Oil level is good. I cleaned the tube and sensor this weekend. ( had to actually pull the cam gear cover the tube/sensor is mounted to because the fittings were so tight). The tube an sensor were quite clogged with soot. I re installed everything and this morning the EBPV started pulsing again after about a minute of operation. No signs of any leaks around the EBPV housing. Any other ideas or possible causes?

On a side note, hucorey how do you like you BTS trans? I have been looking at one for quite a while and have heard good things about them.

Thanks all!!
 

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Does it only pulse when cold, then goes away when warmed up? If so, that's normal. If I were you, living in FL, I'd just unhook it. It serves no purpose that live in temperate climates. Mines gutted and unhooked and so is my exhaust flange butterfly, and I'm in Ohio. Truck doesn't take any longer to warm up in 0* weather than with the EBPV.

Love the BTS. :D:thumbup:
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2001 7.3 CCSB 4X4 2016 6.7 CCSB 4X4
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186 Posts
Discussion Starter #6
I live in FL but currently in OR and may be heading up to AK so I think I should keep it. in previous winter seasons up here in OR, it has always worked with no pulsing would engage and stay until warm or brake pressed. the pulsing is something new that I have never seen/heard before even before I rebuilt the pedestal with new parts it never pulsed.

I just want to make sure that there is no underlying bigger picture issue causing the pulsing.

Thanks :)
 

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Mine does this when warming up in cold weather and was told it was normal. Of course, that doesn't mean it is, just what I was told :dunno: Only does it when idling and stops when I go to take off or tap the brake, so I never really worried about it.
Guess I'll watch this thread too!
 
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