2007.5 ecm problem- Catalyst Full Service Required

[chuck1949]

hello my name is chuck andres, i have a dodge 3500 6.7 cummins with approx 92,000 miles. approx 2 months ago the overhead display started a double chime and read catylyst full service required. but all that was removed. , then motor power dropped down, eventually it goes up again. i have heard other cummins 6.7 owners have had the same problem. i have had all the deletes done to the motor 4 years ago with a smarty jr. tuner. sometime this problem comes back every 10 minutes when i am towing my 5th wheel. then goes away again. is there any kind ECM programming you can do to get rid of this problem? i have been trying everywhere i can. thanks

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[Polaraco]

disconnect the flapper valve under the egr in the air pipe. It's a silver thing in the air flow. The plug is on the back

The ECM is closing the flapper.

What tuner are you using?

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[chuck1949]

i am not familiar with that area of the egr you are referring to. i had all that egr and DPF removed 4 years ago. is there pictures of the area you are talking about on the web? i have a smarty jr tuner installed. thanks for replying chuck

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[Polaraco]

I told you where it is. The flapper is why it's bucking. Anyone still have one installed? We need a picture

I ask again. What tuner are you using?

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[chuck1949]

I am useing the Smarty Jr.Tuner

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[Polaraco]

I am useing the Smarty Jr.Tuner

Smarty is OK for power. They fall short on the deletes. see if there is an update for the Jr. It may fix that message

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