Hey, everyone! I wanted to say thanks for the info so far. I've been a member here for about 30 min and I'm already sure I'm gonna find more help than I can imagine.
I've searched around a little bit, but it seems those with similar symptoms are missing a few of my key ingredients.
Let me start with the truck...2000 F-250 CC SB 4x4 with 7.3L PSD & Auto tranny with 4.10 gears (I think). I got it about 2 1/2 months ago and don't really know much about the PSD. This one does have the K&N Intake & an unknown brand 4" turbo back exhaust without a cat, but I don't know much about those things other than what I can see.
111,111 miles this morning. Got the oil changed at 110K. Added some MOA and started using the Stanadyne Performance fuel additive just after the oil change.
So...here were are this past week, after the oil change and a full tank of fuel, I drove from my home, south of Denver, to Moab, UT. On the way up to the Eisenhower Tunnel, about 3/4 of a mile from the top, I had a sudden loss of power, I went from 75 to 35, heard a ticking from under the dash/engine compartment, and a pretty substantial shaking like an off balance engine. This was under significant load...not towing, but my foot was in it, we'd been climbing for a while with a little head wind, etc. I got off the gas, moved over and started making my way to the shoulder. Once out of the way of traffic, I started back on the gas a little and was still experiencing the problem. I backed off, pulled over and waited for a few minutes. When I got back moving, it seemed okay, but as I got into it a little bit, trying not to be the guy holding up traffic, it came back. I limped to the tunnel where the road became down hill again, things seemed to return to normal.
Once down the hill, I stopped and bought a new cam position sensor which was replaced, but on the next long uphill, it started again. This continued all the way to Moab...head winds, uphill, anything that caused a significant load on the engine led to this power loss.
On our return trip, after unsuccessfully finding help in town because it was the weekend, we started looking at things more closely, since we were able to more accurately determine when the problem would occur. Thinking there was maybe a harness problem, we added some dielectric grease to the valve cover harnesses on both sides without relief. Then we noticed it...a leak from left high pressure oil hose. There are three puddles of oil now in the valley between the valve covers. The left side hose was "oozing" oil out from under the split loom around it, so we couldn't really identify the exact location, although it doesn't seem to be coming from one of the fittings. I'm currently working on getting that fixed.
So...could a loss in pressure at higher throttles (when pressure it probably highest from the pump) cause failure of an injector(s) or at least a miss, since the problem seems to correct itself with less load? Could that cause the left bank to stop working which leads to the violent shaking? Or is there a deeper cause?
I'm sorry if this is long winded, and I certainly hope this doesn't lead anyone to not read my plea.
Thanks for any help available.
Mike
I've searched around a little bit, but it seems those with similar symptoms are missing a few of my key ingredients.
Let me start with the truck...2000 F-250 CC SB 4x4 with 7.3L PSD & Auto tranny with 4.10 gears (I think). I got it about 2 1/2 months ago and don't really know much about the PSD. This one does have the K&N Intake & an unknown brand 4" turbo back exhaust without a cat, but I don't know much about those things other than what I can see.
111,111 miles this morning. Got the oil changed at 110K. Added some MOA and started using the Stanadyne Performance fuel additive just after the oil change.
So...here were are this past week, after the oil change and a full tank of fuel, I drove from my home, south of Denver, to Moab, UT. On the way up to the Eisenhower Tunnel, about 3/4 of a mile from the top, I had a sudden loss of power, I went from 75 to 35, heard a ticking from under the dash/engine compartment, and a pretty substantial shaking like an off balance engine. This was under significant load...not towing, but my foot was in it, we'd been climbing for a while with a little head wind, etc. I got off the gas, moved over and started making my way to the shoulder. Once out of the way of traffic, I started back on the gas a little and was still experiencing the problem. I backed off, pulled over and waited for a few minutes. When I got back moving, it seemed okay, but as I got into it a little bit, trying not to be the guy holding up traffic, it came back. I limped to the tunnel where the road became down hill again, things seemed to return to normal.
Once down the hill, I stopped and bought a new cam position sensor which was replaced, but on the next long uphill, it started again. This continued all the way to Moab...head winds, uphill, anything that caused a significant load on the engine led to this power loss.
On our return trip, after unsuccessfully finding help in town because it was the weekend, we started looking at things more closely, since we were able to more accurately determine when the problem would occur. Thinking there was maybe a harness problem, we added some dielectric grease to the valve cover harnesses on both sides without relief. Then we noticed it...a leak from left high pressure oil hose. There are three puddles of oil now in the valley between the valve covers. The left side hose was "oozing" oil out from under the split loom around it, so we couldn't really identify the exact location, although it doesn't seem to be coming from one of the fittings. I'm currently working on getting that fixed.
So...could a loss in pressure at higher throttles (when pressure it probably highest from the pump) cause failure of an injector(s) or at least a miss, since the problem seems to correct itself with less load? Could that cause the left bank to stop working which leads to the violent shaking? Or is there a deeper cause?
I'm sorry if this is long winded, and I certainly hope this doesn't lead anyone to not read my plea.
Thanks for any help available.
Mike
