Cummins misfire when turbo boost above 10 psi
We own a 2004 Holiday Rambler Scepter with the 350HP Cummins turbo engine. The motor home has less than 30K miles on it. While on the road yesterday, I encountered a problem whereby the engine sta...
Forum Discussion
Frank
Our coach is a 2000 Windsor with the 350hp. ISC engine also. I like others tend to point to fuel filters. You probably have 2, one with a transparent bowl on the bottom and the other has a sending unit to show possible water in fuel. Ours does the same thing when the filter starts to clog, it'll stumble on a grade and the stop engine light comes on then when the load is off of the engine the light goes out. A grade for us here in So. Louisiana is a bridge or overpass. Changing the fuel filter works every time.
What puzzles me on your post is that it happens every time the turbo boost gauge gets to 10. Heck ours runs at +- 10 all the time at hwy. speed, 60/62mph and will go up as grade increases or going into a headwind to a max of about 25. Those readings haven't changed since the coach was brand new. The Cummins people say that this is the normal reading on the gauge.
Dave
Our coach is a 2000 Windsor with the 350hp. ISC engine also. I like others tend to point to fuel filters. You probably have 2, one with a transparent bowl on the bottom and the other has a sending unit to show possible water in fuel. Ours does the same thing when the filter starts to clog, it'll stumble on a grade and the stop engine light comes on then when the load is off of the engine the light goes out. A grade for us here in So. Louisiana is a bridge or overpass. Changing the fuel filter works every time.
What puzzles me on your post is that it happens every time the turbo boost gauge gets to 10. Heck ours runs at +- 10 all the time at hwy. speed, 60/62mph and will go up as grade increases or going into a headwind to a max of about 25. Those readings haven't changed since the coach was brand new. The Cummins people say that this is the normal reading on the gauge.
Dave
