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  1. #1
    Bobtail Member Waterfowler's Avatar
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    Anyone else having problems with their EGR Valve in their Cummins ISX?

    I had mine(an 04 w/ 410k) replaced on the 23rd of February and since then it has been code free until a few days ago when I was pushing the engine hard up a hill, loaded and against the wind. The engine never got hot, I think it was 205 degrees right at the top of the crest, but right before I got to the top my Cummins Road Relay hollered at me with the same code, SPN2791, I was getting all the time before my EGR finally gave out and needed to be repaired in February. I have now gotten 12 faults recorded on the same problem(my only fault code problem) in the last 3 days. I also noticed going down the road once that the motor all of a sudden started sounding a little rough and a fault code immediately shot out.

    Any of you guys with Cummins ISXs been getting this code? The SPN2791 fault code, that's for the EGR valve right? Googling around I read that the EGR valve part(as well as a location change) for the ISX is now made of superior quality by a different manufacturer. I wonder if I got one of "old" ones installed. I think Cummins has a 90 day warranty on this part, do you think it would be too much to demand the repair shop fix this problem for free since it was supposed to have been "fixed" a little over 2 months ago? Or can I only expect them to replace the part under warranty but still charge for labor?

    Thanks for any help or advice.

    Oh yeah, and hello to you all from a first time poster. This looks like a great forum to get info from and discuss things. I don't know why I haven't come across it before.

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  3. #2
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    Expect to pay the labor unless the truck itself is under warrenty. the individual part warrenty will not cover the install.

    Can't help you much more thn that except to say the egr's are big problems for everyone

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  5. #3
    Bobtail Member crztexan's Avatar
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    Is it an Electric EGR Valve or Vacuum EGR Valve? Im unsure about the electric, but if it is vacuum then you need not buy a new one, just find the hole that goes to the EGR behind the throttle body... You may have to look in a manual to find the location of it. All you need to do is get about 3 cans of throttle body cleaner and a throttle body gasket for replacement, then spray all the crud out until it is fairly clean. Let sit for about an hour then start... Engine will run rough for a few minutes because its basically flooded, but will be fine afterwards. IF it is an Electrical EGR valve, as far as I know you have to replace it.

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  7. #4
    Forum Leader/Admin bullhaulerswife's Avatar
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    Just went through a cummins replacement on an injector that carried a 1 yr warranty.

    Here's what I can tell you. If the part is deemed faulty, then the part and the labor should be covered by the warranty, according to the Cummins warranty guy that I spoke to at our regional office.

    Now, getting the place to file a claim with cummins for the labor is where it gets rough. First you have to go to a Cummins authorized facility. Second they have to acknowledge that the part was defective. And third they have to file the claim with Cummins to recoup the cost of the labor and the part.

    Make sure you have the invoice for the original part replacement. That will help.

    Good luck, and keep us posted on what you find out.

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  9. #5
    Bobtail Member Waterfowler's Avatar
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    Quote Originally Posted by bullhaulerswife View Post
    Just went through a cummins replacement on an injector that carried a 1 yr warranty.

    Here's what I can tell you. If the part is deemed faulty, then the part and the labor should be covered by the warranty, according to the Cummins warranty guy that I spoke to at our regional office.

    Now, getting the place to file a claim with cummins for the labor is where it gets rough. First you have to go to a Cummins authorized facility. Second they have to acknowledge that the part was defective. And third they have to file the claim with Cummins to recoup the cost of the labor and the part.

    Make sure you have the invoice for the original part replacement. That will help.

    Good luck, and keep us posted on what you find out.

    Hmmmm didn't know I might be able to hold Cummins responsible for any labor involved in replacing the faulty part. Might get a little tricky since it was the repair shop who actually bought the part. At this point I am just hoping they replace the part for free with a good one. The labor was $240 # 60$ per. I'll see what the shop has to say.

    All you need to do is get about 3 cans of throttle body cleaner and a throttle body gasket for replacement, then spray all the crud out until it is fairly clean.
    It's only been 2 months since the valve was replaced and I drive only around 1500-2000 miles a week. How much "crud" could have been built up in that time? Enough to cause a problem? I had the engine cleaned at the truck wash the day before, I wonder if that had anything to do with it....

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  11. #6
    Forum Leader/Admin bullhaulerswife's Avatar
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    Quote Originally Posted by Waterfowler View Post
    Hmmmm didn't know I might be able to hold Cummins responsible for any labor involved in replacing the faulty part. Might get a little tricky since it was the repair shop who actually bought the part. At this point I am just hoping they replace the part for free with a good one. The labor was $240 # 60$ per. I'll see what the shop has to say.
    According to the warranty guy that I spoke with, it doesn't matter, as long as a qualified shop did the work, meaning not your next door neighbor, and as long as the part is deemed faulty, cummins will stand by the warranty and pay the labor to replace it.

    It took me a lot of phone calls to get this information, and many more to get the shop to agree to file the claim and do the repair at no cost to us, but it can be done.

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  13. #7
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    EGR failures are common on these engines. Before you go replaceing it, take a look at the wiring. Un-plug it and inspect the terminals for corrosion or being loose, check the wiring for bad spots.

    I don't have a way to look up the fault code, or I'd do it for ya...

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  15. #8
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    Quote Originally Posted by Waterfowler View Post
    Hmmmm didn't know I might be able to hold Cummins responsible for any labor involved in replacing the faulty part. Might get a little tricky since it was the repair shop who actually bought the part. At this point I am just hoping they replace the part for free with a good one. The labor was $240 # 60$ per. I'll see what the shop has to say.



    It's only been 2 months since the valve was replaced and I drive only around 1500-2000 miles a week. How much "crud" could have been built up in that time? Enough to cause a problem? I had the engine cleaned at the truck wash the day before, I wonder if that had anything to do with it....
    In some cases yes the build up could be that quick. I have seen some do that in less than a week. It will be enough to give a good coating on the walls of the egr. I really don't think that it had anything to do with the truck wash.

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  17. #9
    Bobtail Member EasyMoney's Avatar
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    EGR valves

    I know of three companies locally that have had major problems with the new cummins, with the EGR valves the most common. I am leased to one of them and have seen first hand how crappy they are. They have 4 new 387 Peterbilts with this engine and they have been nothing but trouble. The owner has been very disappointed with them. After buying used Internationals for years, he decided to bite the bullet and buy new Peterbilts. Imagine how sick he has been!

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  19. #10
    Light Load Member SPIKE 64's Avatar
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    My buddy has an 05 ISX ,best advise he can give you is carry a spare EGR valve with you.

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