Misfiring after 475 miles

[itsmekylep]

it's rarely the PCM. Bosch MG1 ECU's are pretty stout units.

I have very little faith the PCM is the issue. Dealer doesn't have any other RHO's to swap PCM's to verify. Mine wasn't misfiring slightly different issues. Part is back order and been at the dealer since 2/3. Part might be there tomorrow. We'll see.

 

[frogjbm]

There is ALSO one for the lambda sensor wiring pulling out of the sensor. If you look at the lambda sensor that connects near the inlet to the turbos - it's too short from the factory and it's pulling on the pins. They even have an acronym for the pins coming out of the connector. I would think that's what's happening on yours.

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Spot on man, makes total sense! These trucks are known for short cable runs.

 

[gram10]

There is ALSO one for the lambda sensor wiring pulling out of the sensor. If you look at the lambda sensor that connects near the inlet to the turbos - it's too short from the factory and it's pulling on the pins. They even have an acronym for the pins coming out of the connector. I would think that's what's happening on yours.

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While driving tonight I was thinking about the cats melting and too much fuel,(i haven't had any issies) in my fairly limited tuning experience, this seemed off to me. Once the engine starts the combustion process when dropping to idle it goes crazy rich. I can't remember the last time I watched this situation on my previous cars, does this seem normal to you?

 

[Jeffhallphotos]

While driving tonight I was thinking about the cats melting and too much fuel,(i haven't had any issies) in my fairly limited tuning experience, this seemed off to me. Once the engine starts the combustion process when dropping to idle it goes crazy rich. I can't remember the last time I watched this situation on my previous cars, does this seem normal to you?

So my truck is in for service and this is from the service manager. Looks like the catalytic converter is toast.

 

[gram10]

So my truck is in for service and this is from the service manager. Looks like the catalytic converter is toast.

Well, the question is what damaged the cat...

The tech is saying a damaged cat caused the engine to run lean and them melted the cat, what damaged it in the first place..

 

[Jeffhallphotos]

Well, the question is what damaged the cat...

The tech is saying a damaged cat caused the engine to run lean and them melted the cat, what damaged it in the first place..

They are saying that the sensor went bad and thats what melted the CAT

 

[gram10]

They are saying that the sensor went bad and thats what melted the CAT

I see, I think I misread his last text. That would account for one of the possible causes, different from what I witnessed though in terms of running rich.

Hope you get the new cat spot!

 

[daniellelaven022]

Only one of the cats? Did they look at the other one to make sure it’s not both

 

[IdealRace]

Can you please confirm with your technician that it was the front turbocharger's catalyst?

And... if you could... did he bore scope the catalyst through the lambda sensor bungs and see that the catalyst had melted into a ball?

 

[daniellelaven022]

Here’s the line they replaced! Cats didn’t have to come all the way out either which was cool. He was able to look at the new ones and so far so good! Got her back last night so next step is to ceramic coat her! Did tell him about the pull to the right so he reset the steering wheel sensor. The wheel is straight but the damn sensor for the self drive is mounted a little crooked so it gives the illusion the wheels not straight my guy tried to see if he could loosen it and shift it a little no luck. I can deal with it as long as she drives straight My home dealer finally got a their first RHO unit delivered and part of the check in PDI is to reset the steering wheel sensor too so it sounds like it’s a common issue these new trucks are having. If you guys want to attempt to do that yourself before you take it to the dealer to dig further in you have the vehicle running then full crank the wheel left then full crank right total of five times (left then right is 1) then key off for 15 seconds, then key it back on should reset that sensor. You have to go left first. That’s my update yall! Hope you have a great day my dudes!!