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Rough Idle Burning Fuel Rich

 
  #1  
Old 03-13-2019, 06:29 PM
David Fehir
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Rough Idle Burning Fuel Rich


I need some help. I was out riding around and all of a sudden I started getting a real rough choppy idle and the truck is burning fuel real rich with a chader right around 1500 rpms and smoking the whole time. My fuel mileage went from 17.5 to about 13. I'm also getting a turbo bark now I'm assuming it is somehow connected. I thought fuel injector. However when I got home I scanned for codes and I got a ton and I don't know what's going on. I just put a new fuel pump in a few days ago and my fuel pressure is right around 70 psi with the blue spring update. Disregard the egr codes I'm deleted the trucks an 03 with head studs please help. Sorry I forgot to post my codes.
 
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Old 03-14-2019, 07:42 AM
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You have three more injector codes and a fuel pump code. I would start at injectors and make sure your blue spring os seated correctly or you could cause high fuel pressure and blow o-rings off injectors. Since you just worked on the fuel pump I’d check my work again.
 
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Old 03-14-2019, 09:33 AM
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Originally Posted by SmackDaddy View Post
You have three more injector codes and a fuel pump code. I would start at injectors and make sure your blue spring os seated correctly or you could cause high fuel pressure and blow o-rings off injectors. Since you just worked on the fuel pump I’d check my work again.
I've had the blue spring update for a couple years now would it come unseated on it's own?
 
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Old 03-14-2019, 09:41 AM
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It shouldn’t, your post mase it seem like you did the fuel pump and blue spring together.
 
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Old 03-14-2019, 09:53 AM
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Originally Posted by SmackDaddy View Post
It shouldn’t, your post mase it seem like you did the fuel pump and blue spring together.
sorry about that. but no I just changed the fuel pump alone the blue spring was done about 2 years ago. but the cylinder 2 code and cylinder 4 code was already there from when I had the fuel pump issue. I know I should have mentioned that and I'm sorry. but it was late when I started the thread and i didn't think of that. the codes that are current are the fuel pump code, cylinder 5 code, and the cam sensor code, could the cam sensor be causing these issues I've looked up signs and symptoms of a bad cam sensor and it's somewhat similar to what I've got going on except the no start and stalling I don't have those issues
 
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Old 03-14-2019, 07:35 PM
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I Also wanted to mention in the recent past probably within the last 6 months I noticed at random not necessarily a hot start or cold start the truck would do a crank no start. I'd turn the ignition off and try again and it would fire right up like normal. not shore if this would be related to a cam sensor or not or what would even cause this.
 
  #7  
Old 03-14-2019, 08:35 PM
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In the 7.3 world I know a cam sensor can cause all kinds of weird stuff. Including random no starts and weird idle. But never had to change one on a 6.0 before.
 
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Old 03-14-2019, 08:37 PM
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Originally Posted by varminthunter243 View Post
In the 7.3 world I know a cam sensor can cause all kinds of weird stuff. Including random no starts and weird idle. But never had to change one on a 6.0 before.
I'm wondering if it would act the same way in a 6.0?
 
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Old 03-14-2019, 08:45 PM
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I would bet so. Cheap enough part. I kept a cheap oreillys sensor in my glove box to get me home if it quit. And then I would order one from international and put it in. I'd imagine symptoms would be the same. But I'm sure some of the more experienced 6 liter guys will chime in and tell us for sure. I just figure it's an easy part to change and readily available locally usually.
 
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Old 03-14-2019, 08:54 PM
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Originally Posted by varminthunter243 View Post
I would bet so. Cheap enough part. I kept a cheap oreillys sensor in my glove box to get me home if it quit. And then I would order one from international and put it in. I'd imagine symptoms would be the same. But I'm sure some of the more experienced 6 liter guys will chime in and tell us for sure. I just figure it's an easy part to change and readily available locally usually.
I googled the signs and symptoms of a bad cam sensor and almost everything listed as a symptom I have happening except stalling my truck is not doing that they don't mention anything about smoking but I would think that would go along with poor MPG's and my MPG's went down about 4 MPG's
 
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Old 03-14-2019, 09:53 PM
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Something come to mind I remember about a year or so ago I had a code for cam shaft sensor however I had no symptoms other than the code. I cleared the codes and it never came back until now
 
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Old 03-14-2019, 10:14 PM
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No CKP Sensor code?
 
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Old 03-14-2019, 10:15 PM
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Clear DTCs, drive it then scan again for DTCs. It might pop up.
 
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Old 03-14-2019, 10:17 PM
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Originally Posted by SmackDaddy View Post
No CKP Sensor code?
if you mean crank shaft sensor code then no just cam shaft
 
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Old 03-14-2019, 10:19 PM
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They can pop up out of nowhere. I think I remember someone telling me there are soft codes abd hard codes. Soft codes will come and go but hard codes will stay until you clear DTCs.
 

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