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Aug 15, 2012 | 07:31 AM

#46

oldbird1965

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From: AZ

I've never looked at 'EX.BACK PRESS', I'll have to take a look. Last winter though I did clean the tube.

Aug 15, 2012 | 07:44 AM

#47

oldbird1965

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From: AZ

I've been thinking about the flexplate, would a high torque starter and powerful XS power batteries 'hurt' the flexplate? I mean this setup spins that motor over really fast!!

Aug 15, 2012 | 09:26 AM

#48

Talyn

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From: Ashland City, TN

Unless the bolts were loose to the crank, or it was a **** flexplate, I don't see where there would be an issue.

Aug 15, 2012 | 10:44 AM

#49

Hussler

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From: Medford Oregon

Quote:

Originally Posted by oldbird1965

I've never looked at 'EX.BACK PRESS', I'll have to take a look. Last winter though I did clean the tube.

It's not a very exciting parameter to watch. If you have the EBPV unplugged then you won't see much change in the numbers, maybe 3 - 4 PSI at the most. It's interesting to watch in winter when the PCM is using the valve for rapid warmup. PCM likes to keep the back pressure between 20 - 30 PSI but because it's a slow moving valve it's easy to go over 30, then PCM opens EBPV a bit to compensate. Just an interesting parameter to watch and some piece of mind why the rig is doing what it is doing ...

Aug 15, 2012 | 12:44 PM

#50

Talyn

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From: Ashland City, TN

Quote:

Originally Posted by Hussler

Wrong sensor bro.

Were talking about the sensor on the front of the HPOP.

Aug 15, 2012 | 03:00 PM

#51

DIYMechanic

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From: Orrville, Ohio

Quote:

Originally Posted by Talyn

Wrong sensor bro.

Were talking about the sensor on the front of the HPOP.

No, Jim is talking about the right one. That's the EBPS. It has a tube that feeds down into the passenger side manifold.

Aug 15, 2012 | 03:01 PM

#52

Hussler

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From: Medford Oregon

Quote:

Originally Posted by Talyn

Wrong sensor bro.

Were talking about the sensor on the front of the HPOP.

That's what I'm referring to, exhaust back pressure sensor.

Aug 15, 2012 | 03:18 PM

#53

Talyn

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From: Ashland City, TN

Oh crap, I'm sorry. Your wording led me to believe you were saying it was the EBPV.

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Aug 15, 2012 | 08:59 PM

#54

oldbird1965

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From: AZ

Running around light today, maybe 20 miles, I was reading 14 to 18 depending on load.

Aug 16, 2012 | 07:02 AM

#55

DIYMechanic

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From: Orrville, Ohio

I would guess that's about normal. It should read close to a 1:1 ratio to your boost pressures.

Aug 16, 2012 | 08:15 AM

#56

Talyn

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From: Ashland City, TN

Quote:

Originally Posted by DIYMechanic

I would guess that's about normal. It should read close to a 1:1 ratio to your boost pressures.

I never see mine over 14 and never under 10.

I wonder though, if you are seeing higher backpressure numbers what that could help diagnose.

Aug 16, 2012 | 08:25 AM

#57

DIYMechanic

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From: Orrville, Ohio

I wouldn't worry about the back pressure numbers as long as they correlate to about a 1:1 ration on the boost pressure. The more fuel you dump to it, the more boost and back pressure you can expect to see.