annoying problem! please help!!
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New User
Joined: Jun 2004
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annoying problem! please help!!
My 97 powerstroke has an annoying flat spot at 2000 rpm. When I arrive at this RPM acceleration stops and there is a cloud of unburned diesel coming from the exhaust pipe. This is worst if there is no load on the vehicle. If I persist in pushing the rpm's, I can get it to go to about 3500 rpm and it sound and feels strong. If I don't push it to the higher rpm's it will persist in the flat spot at 2000 to 2200 rpm.
I really need some help with this. I have had the engine checked at the dealer and the sensors were replaced as needed, but there was no change. I had the exhaust gate disconnected, which improved the cold engine performance, but no change in the acceleration.
I really need some help with this. I have had the engine checked at the dealer and the sensors were replaced as needed, but there was no change. I had the exhaust gate disconnected, which improved the cold engine performance, but no change in the acceleration.
Freshman User
Joined: Feb 2004
Posts: 44
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From: sandpoint idaho.
this is my fathers truck, it couldn't pull it's self outta a ***** pile. i drove it today and let the clutch out as fast as i woulda in my 75 390 and it stalled. for a deisel it sucks. when you get it to 2000RPM you hae to hold it to the boards and it stutters chugs its way to 2500 or so, it'll run a little better untill 3000 then it roars to life. it seems the harder and faster we run it it seems to pull better. if we do lots of low R's for a week it cant pull it's self up the hill we live on in 4th. this is driving us crazy and we need to get hay next month.as a whole this engine underperforms. any ideas at least would be helpful. i was told by my mechinic that the turbo blades were bent. this is where i think differently then my father. i think that the cloud of smoke is oil being sucked into the turbo when its reaches an off-balence spot, or the turbo stops forcing enough air into the mill so the fuel mixture is way too rich...???
PS hey dad, you truck sucks!
PS hey dad, you truck sucks!
Posting Guru
Joined: Feb 2004
Posts: 2,365
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From: IOWA
It does kinda sound like it could be the turbo, all the fins are shot. I drove a 94.5 PSD on the wheat harvest last year and at the beginning of the year it ran great, could pull two 30ft headers no problem, but by the end of the summer, and many rather harsh drivers, the turbo was gone, couldn't hear it spooling up until it was at redline. It didn't have the power it used to and like you said, just wouldn't pull well at low rpm. It would make sense with all the black smoke as well, you are getting the fuel but not the air in the cylinder. Beyond that, I'm not sure what it would be. Take apart your intake connected to the turbo and take a look at the fins in the housing, might have to get a new wheel.
Good luck.
Good luck.
