Today the head of quality control for Cummins came and gave a speech to my class. Afterwards, I asked him what he knew about the fueling system issues that the 600s are having. He said that there are an abnormally large number of failures (admitting there is a problem!). He said the issue is with the Bosch fuel pumps, not the injectors. Apparently the pumps are failing, and that's causing all of the problems. Perhaps bits of the fuel pump are getting into the injectors? However, the pump failures can manifest themselves in apparent injector failures. When I asked about injector problems themselves, he said that he hadn't heard anything about those. He also said for the most part, these trucks were running just fine no problems, but that the number of failures is abnormally high, and that Bosch is working on a solution.

So, perhaps STAR's method of dealing with these fueling problems by replacing the injectors isn't solving the problem because it isn't the problem. I doubt there will actually be a recall to replace the fuel pumps, seeing as that would be a huge expense on the part of whoever had to foot the bill for it, so it seems this may be something that we (and the DuraMaxers who have the same fuel system) will be facing. It's unacceptable, but if Bosch can make a new fuel pump that will last a million miles, I'm willing to put that in.

Of course, this could all be corporate cover-up, but I thought it was interesting and wanted to share with you guys.

Very interesting on the Cummins guy admitting there is a problem. I'm not betting on a cover up from DC. It seems it would be in their best interest to fix the problem so as to avoid any huge warranty problems from customers. They will surely have Bosch pay for some/all of the warranty costs if Bosch is to blame. It's also in their best interest to keep Dodge owners satisfied. When a corporation sees a large increase in failures of one type, they will look at it and investigate because their warranty costs are going up. If they see that most of the trucks with failures have aftermarket mods that affect the fuel system (I'm not saying this is correct in this case but they will look at it) they will blow it off as the owners problem. They may even find that the problems exist with one batch of bad parts and try to narrow the repairs down to those trucks only. But if Cummins knows about it, then you know DC knows and someone is working on it. Let's hope they :grd: .

So now Cummins 600 is starting to have fuel issues, with Bosch. Makes you wonder if these High pressure systems designed in Europe, really do require really clean fuel. I wonder if Navistar is going to be the only Diesel that still has the original injectors at 200,000 miles since their Fuel system is oil driven. Let's hope they (Bosch) can get a handle on this, I'm at 56,000 on my D/A, but getting paranoid with all this talk of Injectors failing.

Really requiring clean fuel seems probable (which therefore demonstrates the importance of changing your fuel filter often and using a high quality unit). When EFI came out originally (mind you, Bosch was one of the pioneers), supposedly there were similar issues (I wasn't around then), and then the fuel got better to make up for it.

We'll see what happens. I'm at 15k on my 600 with not even a hint of problems. I plan on keeping this truck for a long time because it's a great truck and I paid a lot of money for it. If it means that I have to mess with the fuel system at some point, I'm willing to accept that... but as long as it's under warranty I will beat my dealership into submission until they fix it.

Ted, I agree. If there's a problem with anything I expect DC to fix it under warranty. With only 7k on my truck I haven't had the need to take it back to fix anything. I bought this truck to tow my camper and last a long time with the expectation of it lasting like the old Cummins Dodges I see in campgrounds that are still pulling and still running great.

After this weekend 16,950 on the clock and still no problems. Expect somewhere north of 20k by the time summer hits.