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post #1 of 34 (permalink) Old 10-31-2007, 01:27 AM Thread Starter
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motor slugish when cold

In the morning when I leave for work, it is slow to rev up until it hits about the 2krpm mark. Then it revs fine. I know it's not my imagination, it's much too noticeable to be that.
It's done this since I've had it.
The motor has to cool off completely.
Overnight temps are around 45-50, about 50 when I leave.
It get worse as the weather gets colder.
Once I can just start to feel heat out of the vents is when it starts to improve. Generally about 3-7 minutes.
By 10 minutes, in all but really cold weather, it is running fine. In really cold weather (0-10 deg f) it takes about 15 min.
It does it in all programs, and it did it before I did anything other than change the oil & air filter.

Is this programmed to happen, or do I have a temp sensor on the way out?

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post #2 of 34 (permalink) Old 10-31-2007, 01:53 AM
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Re: motor slugish when cold

I kind of have the same problem. I was thinking it was just because it was cold. I hope thats all it is lol

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post #3 of 34 (permalink) Old 10-31-2007, 01:58 AM
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Re: motor slugish when cold

changing your oil to the 30 sae will help

You call yourself a mechanic, you can't even fix a mechanical pencil.


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post #4 of 34 (permalink) Old 10-31-2007, 03:29 AM
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Re: motor slugish when cold

What you are noticing is the EBPV closing. When it restricts the exhaust to warm the engine up it will rob some power. This is normal operation.

You can disable it if you want but warm up time will be longer.

Eric
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post #5 of 34 (permalink) Old 10-31-2007, 03:41 AM
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Re: motor slugish when cold

^^^ what he said

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post #6 of 34 (permalink) Old 10-31-2007, 04:21 AM
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Re: motor slugish when cold

There's more to it than that. Programming is adjusted for cold operation, so the engine does run differently. The EBV is also part of it.

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post #7 of 34 (permalink) Old 10-31-2007, 04:35 AM
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Re: motor slugish when cold

you have to remember as well your injectors are fired by oil.........

cold thick oil is harder to pump than warm thin oil.....hence the better running when heat starts out the vents.
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post #8 of 34 (permalink) Old 10-31-2007, 12:59 PM
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Re: motor slugish when cold

so nothing serious.

sweet

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post #9 of 34 (permalink) Old 10-31-2007, 01:31 PM
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Re: motor slugish when cold

Quote:
What you are noticing is the EBPV closing. When it restricts the exhaust to warm the engine up it will rob some power. This is normal operation.

You can disable it if you want but warm up time will be longer.
I'd unplug it but if it's still sticking I'd get the delete kit. Sometimes those things get old & will get stuck in the partly closed position. In other words you may as well be driving with an exhaust brake on.


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post #10 of 34 (permalink) Old 10-31-2007, 02:43 PM Thread Starter
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Re: motor slugish when cold

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Originally Posted by racehauler View Post
What you are noticing is the EBPV closing. When it restricts the exhaust to warm the engine up it will rob some power. This is normal operation.

You can disable it if you want but warm up time will be longer.
It's no longer automaticaly actuated. I cut the wire from the PCM and the actuator is on a switch.

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