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Old 04-22-2016, 03:26 PM   #1
coy-ote
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Default 7.3 question

Has anyone ever had any mpg difference by cleaning or replacing the exhaust gas back pressure sensor that is in front of the hpop and the tube that connects to exhaust pipe


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Old 04-22-2016, 05:46 PM   #2
firecapt186
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I have a 2002 7.3 and changed the complete exhaust from the turbo back and don't recall any sensors. Is the sensor before the turbo? Mine didn't even come with a converter, some did, all depended on where they were built.
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Old 04-22-2016, 07:02 PM   #3
coy-ote
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I did the same exhaust the sensor is on the down pipe on my 99


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Old 04-27-2016, 03:53 PM   #4
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Bump


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Old 04-27-2016, 05:51 PM   #5
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If I'm not mistake it is only on the trucks that have cats and not all 7.3s have cats but I could be wrong


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Old 04-27-2016, 05:54 PM   #6
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Tag
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Old 04-27-2016, 06:10 PM   #7
coy-ote
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What years had the catalytic converters?


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Old 04-27-2016, 06:17 PM   #8
pblaetz
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Quote:
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What years had the catalytic converters?


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'94 - '97's had cats
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Old 04-27-2016, 06:18 PM   #9
Smart
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Yes. My 2001.... Replaced the sensor since the old one was choked full of soot and cleaned out the tube. It was choked as well. Mph went up by 1.5 and the warm up was much better on cold days with no more jumping to high rpms.
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Old 04-27-2016, 06:30 PM   #10
coy-ote
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Mine runs great but it has a hissing when it's cold so I was trying to look up and see if this was the cause


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Old 04-27-2016, 06:35 PM   #11
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Quote:
Originally Posted by coy-ote View Post
Mine runs great but it has a hissing when it's cold so I was trying to look up and see if this was the cause


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It is....That is the high rpms I was talking about.

It will still do it some... as it is supposed to, but it won't be immediate every time you start it like it does when the sensor/pipe is clogged. Its a quick easy fix if you don't have a second alternator. I had to take off my second alternator to make mine easier....

I cleaned my tube with square weedeater line, a dewalt drill and brake cleaner.
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Old 04-27-2016, 06:45 PM   #12
coy-ote
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I saw the sensor and tube on eBay for around $ 45 was thinking bout just replacing them since it's the first of the 99's that came out I got it in July of 98


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Old 04-27-2016, 06:49 PM   #13
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Not all 94-97s had cats either, it just depends on what plant they were made at


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Old 04-27-2016, 06:52 PM   #14
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Quote:
Originally Posted by coy-ote View Post
I saw the sensor and tube on eBay for around $ 45 was thinking bout just replacing them since it's the first of the 99's that came out I got it in July of 98


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Its worth a shot.
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Old 04-27-2016, 06:54 PM   #15
coy-ote
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Thanx for the info, my mileage had dropped but I thought it was the low sulphur fuel will give it a shot


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Old 04-27-2016, 10:30 PM   #16
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Cleaning the tube and sensor is easy so it doesn't hurt to try it. Becareful though because you may rub a hole in the tube while cleaning it What I found is that my 7.3's don't like the low sulphur fuel and a few tanks without some conditioner I could tell a difference in the idle.
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Old 04-27-2016, 10:49 PM   #17
coy-ote
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what conditioner do you run in your I always ran diesel kleen..........
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Old 04-27-2016, 11:24 PM   #18
Smart
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Default 7.3 question

I have run Lucas since 2002 in mine

265K miles and still going strong ...knock on wood.
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Old 05-23-2016, 05:55 PM   #19
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Quote:
Originally Posted by coy-ote View Post
Mine runs great but it has a hissing when it's cold so I was trying to look up and see if this was the cause


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That hissing sound is the EBPV closing on the outlet side of your Turbo.It closes and restricts exhaust flow to warm up the engine faster by causing a load on the engine.It can deleted ,welded open ,or unplugged. The actuator rod for the valve is also a great place for an oil leak in the Valley,which leads people to think they have a rear main leak. I replaced the Up Pipes in my truck which required the turbo be removed so I just deleted mine all together will the Turbo was off. It required a new Turbo Pedastol ($125) and a Exhaust outlet on the Turbo($75).Made a noticeable difference in EGT's and spool up.
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Old 05-23-2016, 06:03 PM   #20
DRettele
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Quote:
Originally Posted by Smart View Post
I have run Lucas since 2002 in mine

265K miles and still going strong ...knock on wood.
^^^^ This

Lucas is well worth the small investment.
I run it in my 2001 since the low sulfur diesel came out and I now have 195k miles.
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Old 05-23-2016, 07:07 PM   #21
Smart
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Quote:
Originally Posted by coy-ote View Post
I saw the sensor and tube on eBay for around $ 45 was thinking bout just replacing them since it's the first of the 99's that came out I got it in July of 98


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So what was the verdict?
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Old 05-23-2016, 08:13 PM   #22
coy-ote
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Well I haven't driven the truck I bought the sensor and tube on eBay will try and get it on soon and post the results


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