Poor running on start up
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Senior User
Joined: Feb 2003
Posts: 420
Likes: 0
From: Ohio
Poor running on start up
On occasion, my truck runs like 
after starting up cold.
It seems I can make it do this if I turn on the A/C right after starting.
It acts like it is running on 2 cylinders. Pushing the accelerator does nothing. It seems connected somehow to the idle compensation function.
If I take it out of AC, get it to rev beyond 3000rpm, it usually "resets itself" and runs fine. This only happens with a bone cold engine.
Any input???
after starting up cold.It seems I can make it do this if I turn on the A/C right after starting.
It acts like it is running on 2 cylinders. Pushing the accelerator does nothing. It seems connected somehow to the idle compensation function.
If I take it out of AC, get it to rev beyond 3000rpm, it usually "resets itself" and runs fine. This only happens with a bone cold engine.
Any input???
Junior User
Joined: Jun 2002
Posts: 69
Likes: 0
From: usa
Poor running on start up
same here, got 21000 on my 02 V-10 CC . i would say it has happened maybe 5 times. you crank up , put in drive and almost GO, but not quite, in the cold season , no matter what i drive i always let the truck warm up a bit however, this little problem does not care weather warm or cold.
Freshman User
Joined: Sep 2002
Posts: 37
Likes: 0
From: Denver USA
Poor running on start up
Had the same problem on my truck. Was finally able to pull a code and it was P0316. This code is misfire in first 1000 revolutions. Ended up being a coil pack that was flaky. Had it replaced and the problem went away.
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Senior User
Joined: Feb 2003
Posts: 420
Likes: 0
From: Ohio
Poor running on start up
OK...for those of us that are acronym challenged (like me)
IAC.... (Idle Air Control ?????????????????? )
What is it.... what is it SUPPOSED to do.
Inquiring minds want to know.
IAC.... (Idle Air Control ?????????????????? )
What is it.... what is it SUPPOSED to do.
Inquiring minds want to know.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Poor running on start up
If you put your foot on the gas and still does nothing the IAC can't be the problem cause all it does is let air in just like yer foot.
Sounds to me like a lack of fuel problem. something in the fuel system isn't allowing the system to build pressure...my 2 cents
Sounds to me like a lack of fuel problem. something in the fuel system isn't allowing the system to build pressure...my 2 cents
Mountain Pass
Joined: Aug 2000
Posts: 144
Likes: 0
From: Centreville, Virginia
Poor running on start up
Mine does the same thing sporadically. If I hit accelerator, it goes away. I have an 2001 250 w/ 5.4L.
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Postmaster
Joined: Nov 2001
Posts: 4,742
Likes: 8
From: OK
Poor running on start up
I'd definitely investigate the problem Mscales reported. More than one vehicle design has given the 5.4L coil-packs some problems. Mostly with A/C condensate dripping on them.
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Senior User
Joined: Jan 2002
Posts: 234
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From: Moriches USA
Poor running on start up
I posted a similar problem awhile ago about cold starts even if it's not cold out! Only happens with a full or nearly full tank. Blackend tailpipe, smell, truck would shake on starting, would stall sometimes as I left the driveway? Thought a fuel pressure problem or kinked hoses. It's gotten better after 40K, it doesn't stall but still runs rich and stinks with an almost full tank. Other than that it runs fine. trimman