alaskaforby4
Senior Member
More truck problems... This one is a '85 International S2200 with a Cummins big cam 350.
Earlier this summer I was cruisin along and the motor was feeling sluggish, didn't really like pulling the excavator up a hill.
I was almost to the job so continued on. On my return trip it was still feeling sluggish with an empty trailer. I had just put
new fuel filters on it but figured this would be the easiest place to start. So I changed them, no change. It was slow to rev
up, very poor throttle response. So I had a guy come take a look at it. No turbo boost was the problem, so I took another one off
of my old 290 cummins with 1,100,000 miles on it...problem solved! weee.......no. It lasted for about 2 weeks then I am having the same
problem again, very sluggish, no power, naturally aspirated feeling. So that was an old turbo, probably on its last leg. So I took the original one in and had it
rebuilt, put it on...problem solved! weee....... no. This one lasted 3 weeks and its back to its same old game, this time I was quite suspicious of
its intentions. But I had to start with the turbo, off it went back for inspection. Nothing wrong with it. I then took the intercooler off and its clean
as a whistle, aircleaner is new. I am getting a vac until 1500 rpm then the turbo starts boosting and I will get 1lb at 2400 rpm with no load.
Looking for some ideas, thanks!
Earlier this summer I was cruisin along and the motor was feeling sluggish, didn't really like pulling the excavator up a hill.
I was almost to the job so continued on. On my return trip it was still feeling sluggish with an empty trailer. I had just put
new fuel filters on it but figured this would be the easiest place to start. So I changed them, no change. It was slow to rev
up, very poor throttle response. So I had a guy come take a look at it. No turbo boost was the problem, so I took another one off
of my old 290 cummins with 1,100,000 miles on it...problem solved! weee.......no. It lasted for about 2 weeks then I am having the same
problem again, very sluggish, no power, naturally aspirated feeling. So that was an old turbo, probably on its last leg. So I took the original one in and had it
rebuilt, put it on...problem solved! weee....... no. This one lasted 3 weeks and its back to its same old game, this time I was quite suspicious of
its intentions. But I had to start with the turbo, off it went back for inspection. Nothing wrong with it. I then took the intercooler off and its clean
as a whistle, aircleaner is new. I am getting a vac until 1500 rpm then the turbo starts boosting and I will get 1lb at 2400 rpm with no load.
Looking for some ideas, thanks!