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Old Jun 21, 2010 | 05:46 PM
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why is this?

why does it seem like my truck runs better when it is cold? (engine temp, not ambiant). i am due for an oil change, but not by much. in fact, i still have a few miles left.
 
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Old Jun 21, 2010 | 05:49 PM
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What exactly do you mean by "runs better"?
 
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Old Jun 21, 2010 | 05:55 PM
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it seems like it has a little bit more power and throttle response.
 
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Old Jun 21, 2010 | 05:59 PM
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Don't know, never noticed anything like that. I never drive it till its warmed up though.....hard on a motor to drive when cold
 
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Old Jun 21, 2010 | 06:01 PM
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i know. iam talking about the first 20-30 min
 
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Old Jun 21, 2010 | 06:04 PM
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I understand, still can't help you though. Sorry George
 
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Old Jun 21, 2010 | 06:08 PM
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maybe iam doing to many drugs or not enough.
 
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Old Jun 21, 2010 | 06:59 PM
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IPR o-rings?

I think I've heard that when it warms up it can let some oil by and make it run worse?
 
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Old Jun 21, 2010 | 07:04 PM
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Not sure this has any relevance but cold air being more dense makes it easier for the engine to run. At least for the jet engines I work on plus it could be the reason why people do cold air intakes. Better for combustion.
Just a thought really.
 
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Old Jun 21, 2010 | 07:07 PM
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the cold air theory was the first thuing to come to mind, i park in the shade at work, and it is not hot when i leave for work. brownie, i did plan on doing the IPR this weekend. iam assuming it has never been cleaned in this trucks life
 
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Old Jun 21, 2010 | 07:09 PM
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Mine runs way better once its warmed up,(pulls a lot harder, less lag) is that just because the oil thins out when it is hot or is something not quite right?
 
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Old Jun 21, 2010 | 07:11 PM
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Timing is advanced with cold oil. But on mine I have more noise and less power until EOT comes up a bit. Just the opposite what you are describing. But you have stage 1's and a chip so ....
 
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Old Jun 21, 2010 | 07:12 PM
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engine oil actually gets thicker as it heats up.

15w40 is 15 weight when cold and 40 weight when warm
 
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Old Jun 21, 2010 | 07:15 PM
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Originally Posted by Hussler
Timing is advanced with cold oil. But on mine I have more noise and less power until EOT comes up a bit. Just the opposite what you are describing. But you have stage 1's and a chip so ....
true, but iam talking about the chip in stock mode. the more i think about it this kinda started after i put in the newest latest gratest CPS.
 
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Old Jun 21, 2010 | 07:15 PM
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Not sure though I do know from what a lot of people say our trucks run better at operating temp vice cold. My truck does the same a little lag unless warmed up.
I recently unplugged the EBPV might be right if not that's ok too lol Do notice a bit of difference though truck used to shake when starting it up to leave work but not in the morning after sitting all night no clue what's up with that but she still fires right up and only has 109k on it now.
 
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