Originally Posted by Traps90
Any update on what is wrong with your with your engine.
Good news. I talked to a tech at Rush Truck center when I was purchasing a Navistar secondary fuel filter, higher micron rating than the Fleetguard from what I read. Rush was not able to get the coach in the shop for a few weeks. I am leaving on a non coach trip this week so it will have to wait. He had a few ideas, along with the service manual.
It still felt like a slight fuel starvation issue to me, and the tech agreed with high power really being the only issue. It was our thinking that the codes the coach threw could be caused by the coach sensing fuel starvation.
I cleaned the electrical connections on the EGR, code was "slow moving EGR valve" and the EBP sensor "low exhaust gas pressure". I changed both the primary and secondary fuel filters, I had just done that a few months ago but better safe than sorry. I also cleaned the fuel strainer, there was a slight yellow film on it. Cleaned it with MAF sensor cleaner, the gentlest good cleaner I could think of. It needs to be cleaned every 30K miles and mine was getting close milage wise. I did run across the fact that 2009 engines and older have a 150 micron fuel strainer and from the manual it appears the 2010 and newer engines have a 100 micron fuel strainer. The tech did not know the reason for the change. I do run a fuel additive all the time for lubricity and cleaning of the injector pump and fuel injectors.
I cleared all the codes and took the coach out for a test run, no issues so far. It will get a real trip in next month and I will try and remember to provide an update.
I still want to take the coach in and have it checked for updates, the tech stated there are a few EGR updates out there. I know about a EGR recall but it does not seem to affect our 2009 engine.
There is a TON of information out there on our EGR systems. Seems there is an issue with the hot side of the exhaust gas heat exchangers for the EGR system. It seems to affect higher milage engines, some not all, and there are some really good kits out there for solving the issue. It should not apply to most of us....yet.
I am going to perform a radiator flush and refill when I return. The coolant tested ok but 10 years is enough in my book and for a few $$ I can accomplish it myself. Bought one of these to do the job correctly.
Well I will keep my fingers crossed when I get back and get the coach in for a computer checkout and get a real trip under our belt.
See you all in a month :-) or so,