Hi gang, Been awhile, but that's life eh? Anyway, I think my motor might be fried in the worst case, maybe a bad ring, bent valve, cracked head, etc. Looks like with the new format on the forum, all my info is gone so here goes: 2005 Tacoma 4WD, 182K, TRD S/C, red URD pulley, 7th injector, UCON EMS with cam gears, etc. URD Spec-U exhaust, upgraded fuel pump, recent S/C overhaul. Truck is used for work with a camper on it, gross weight is about 6K with suspension and breaks upgraded to handle it. I had a head gasket go in 2011 and upgraded to a Cometic and ARP head studs. I had an issue last week on a hot day that I missed a shift and bounced the rev limiter while in traffic and about ten minutes later I lost power and got a blinking CEL telling me I was having mis-fires, was just under a 1/4 tank of gas. The power steadily dropped until the motor just died and I was on the side of the road, got towed. I got it home and let it cool down for a few hours. Then I started it up and it ran pretty rough, sounded bad and threw a P0351 which was #1 cylinder misfire. At Gadget's advice, I swapped plugs, no dice. Then I swapped coils and the code moved to the new cylinder so the coil was bad. I got a new one and it started right up, no codes. Fast forward a couple days and it is just not running right, seems a bit low on power and I hear more "chugging" if that makes any sense. I did a job last night in that I had to put it in 4-low and go up a fairly steep climb for a few miles, gaining 1,800 vertical ( 8,000 to 9,800 feet elevation ). It seemed ok, I did not push it though, kept it at 2,500 or so. But on the way down, I heard that chugging noise a bit more as in a cylinder with low compression was dragging a bit. It just does not sound right and I can feel the roughness through the shift knob. So I am feeling pretty unsettled at this point, mandatory compression check which means pulling the S/C off to get to the driver side plugs. But this morning, I started it up which seems a tad fast compared to normal and did some revs. The red flag was when I went passed 3K, I think the guardian on the UCON was kicking in and pulling it back down, something I had not noticed when driving it. Either way, it was doing this up and down thing anywhere above 3K. As I said above, I am getting the truck in for a compression test but in the meantime, I gotta start thinking new motor as this one has 182K on it, 130K S/C'd so my luck might be running out. What ya'll got for sources?