Attention: TDR Forum Junkies I am concerned that I may have a problem developing with my motor. I currently have 70,000 miles on the truck without any problems. The truck is used mostly for commuting 42 miles each way to work.
Occasionally it gets to work by hauling the 5th wheel. In the past it would feel that it would get stronger the further I would pull, as if it was ‘blowing the cobs out’ as we used to say. The truck seems to really like to run 70 mph or higher when it is pulling.
I just returned from a 1200-mile trip with the trailer. The power just didn’t seem to be there. I have experienced several times in the past 6 months the dead accelerator pedal, which clears up when I stomp on it a couple times. The lift pump is original and I monitor it with a gauge. I was concerned that the pressures had been low at 6-7 lbs idle and below 4 at WOT. Currently, within the last 2000-4000 miles, the pressures have been consistently 10-11 lbs at idle and 7 at WOT. The motor doesn’t seem to run as smoothly as before, at WOT it seems almost like a miss or a weak cylinder. I have hit pyro temps as high as 1400 pre turbo before I noticed and then dropped the power to a level not to exceed 1200 for any amount of time. I did have the stock turbo wastegate turnbuckled closed and could hit 26 psi, I have removed the turnbuckle when I noticed the motor running differently and now peaks at 20 psi. I consistently use fuel conditioner of various brands.
I am wondering if the injector pump is getting bad, since the lift pump pressures seem to have changed. Or if I burnt a piston at high temps. Or perhaps a less serious problem. I don’t know what the symptoms are for a bad injector pump or for a damaged piston so if someone could help out. Anything I should check out?
Occasionally it gets to work by hauling the 5th wheel. In the past it would feel that it would get stronger the further I would pull, as if it was ‘blowing the cobs out’ as we used to say. The truck seems to really like to run 70 mph or higher when it is pulling.
I just returned from a 1200-mile trip with the trailer. The power just didn’t seem to be there. I have experienced several times in the past 6 months the dead accelerator pedal, which clears up when I stomp on it a couple times. The lift pump is original and I monitor it with a gauge. I was concerned that the pressures had been low at 6-7 lbs idle and below 4 at WOT. Currently, within the last 2000-4000 miles, the pressures have been consistently 10-11 lbs at idle and 7 at WOT. The motor doesn’t seem to run as smoothly as before, at WOT it seems almost like a miss or a weak cylinder. I have hit pyro temps as high as 1400 pre turbo before I noticed and then dropped the power to a level not to exceed 1200 for any amount of time. I did have the stock turbo wastegate turnbuckled closed and could hit 26 psi, I have removed the turnbuckle when I noticed the motor running differently and now peaks at 20 psi. I consistently use fuel conditioner of various brands.
I am wondering if the injector pump is getting bad, since the lift pump pressures seem to have changed. Or if I burnt a piston at high temps. Or perhaps a less serious problem. I don’t know what the symptoms are for a bad injector pump or for a damaged piston so if someone could help out. Anything I should check out?
