Power Loss When Warm
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Junior User
Joined: Dec 2003
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Power Loss When Warm
My '93 5.8 F250 seems to be losing power when it is warmed up. I thought it might have lost some power after a prolonged hill climb a few weeks ago (outdoor temp about 70), and it smelled a bit hot despite the coolant temperature being normal. After coming down the hill, all seemed normal, so I thought perhaps I was imagining it.
Now, with the outdoor temperature in the low 90s, I'm quite sure it had lost some power on my normal drive home today (flat terrain, city driving.) The truck actually has an upgraded radiator (I believe it's from a 460) as the previous owner had set it up for a camper shell. The coolant temperature does not seem to be any different than normal.
There doesn't seem to be any miss, hesitation, or any symptom other than it just doesn't pull as hard under moderate-heavy acceleration. Has anyone else experienced this?
Now, with the outdoor temperature in the low 90s, I'm quite sure it had lost some power on my normal drive home today (flat terrain, city driving.) The truck actually has an upgraded radiator (I believe it's from a 460) as the previous owner had set it up for a camper shell. The coolant temperature does not seem to be any different than normal.
There doesn't seem to be any miss, hesitation, or any symptom other than it just doesn't pull as hard under moderate-heavy acceleration. Has anyone else experienced this?
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Junior User
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Good Question
Don't have a timing light. Maybe I need to get a hold of one. Do you know if Autozone loans these?
How exactly would the timing being off cause a problem only when the vehicle is warm? I'm not doubting you, just hoping to learn. Thanks for taking the time to reply.
How exactly would the timing being off cause a problem only when the vehicle is warm? I'm not doubting you, just hoping to learn. Thanks for taking the time to reply.
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I've read a bunch of posts about timing and seen references to people spinning their tires with the 351W. From a standing start, if I slammed the gas to the floor, I doubt I could spin my tires even on wet pavement. I have an F250 with 3.55 gears, E4OD and stock 235/85/16 tires. Should I be able to spin the tires? Not that I'd want to, but I'm wondering if perhaps I don't have something robbing me of power that I wasn't even aware of.
Also, can anyone answer my previous question about why bad timing could cause a problem (or cause the problem to be more noticeable) when the vehicle is warm?
Also, can anyone answer my previous question about why bad timing could cause a problem (or cause the problem to be more noticeable) when the vehicle is warm?
