Some kind of idiotic power issue

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Jrgunn5150

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So, I generally take the same route to and from work everyday. 28 miles of two lane kind of hilly highway, followed by 6-7 miles of freeway, then two blocks of city traffic and I'm at work. No issues, Pigpen runs fine, maintains speed, can keep up with, pass traffic, whatever. It's fine.

Lately, when I leave, the route is reversed obviously. So i go two blocks, get on the freeway 7 miles, then two lane on home. The on ramp is a curly Q style, with a short run, and it's up hill, onto an uphill freeway, so it's a bit taxing to say the least, semi's run with their flasher's on kind of thing.

The truck struggles up the hill, with 1/3 to 1/2 throttle, it just doesn't gain speed. It was able to hit 70 by the top of the hill, now it's at like 50. Once over the hill, I usually set the cruise and head home, now it can't maintain speed. It kicks down into third, it rev's to the moon, and still loses speed. It's like I'm pulling a trailer up a hill, with another trailer on top.

I've scanned for codes and have none, scanned for misfires and have none. Fuel pressure is sitting at 58 psi as it always has. Truck has new distributor, cap, rotor, plugs, wires, fuel filter. Had all that before too.

So here's a video,

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Here's my Toyota on the same route, with the same gearing and tire size,

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And today, as an experiment, I took the freeway in, which gave me about 10 miles of two lane, then onto the freeway, truck ran fine, held speed fine.

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chipskittles

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I've had a couple cars do that, it's like they hit a wall around 70. No overheating, no other symptoms. I would put money on it being a clogged cat.
 

Justin S

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Just throwing this out there, but what if its not engine related? Maybe something with the torque converter?
 

Jrgunn5150

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Just throwing this out there, but what if its not engine related? Maybe something with the torque converter?

Could be, but what ever it is, it's temperature related. I just drove it the same route as I go home and it was fine. The only thing that's changed is the temperature. It's 57 outside today, it was in the 30's when it was struggling.
 
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