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2001 ford 4.0 cold idle issue



 
 
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  #1  
Old November 5th 05, 07:54 PM
grimB
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Default 2001 ford 4.0 cold idle issue

I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
when its about 40F outside idle acts like it wants to stall. I can baby it
and get it running again after it stalls like this but it must be some cold
air thing for it to act this way only in cold months. Any ideas are welcome.


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  #2  
Old November 5th 05, 08:19 PM
Stan Weiss
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Default 2001 ford 4.0 cold idle issue

If it has an IAC sensor like my 2000 4.6l SOHC (Mustang GT) that could
be the problem.
Stan

grimB wrote:
>
> I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
> when its about 40F outside idle acts like it wants to stall. I can baby it
> and get it running again after it stalls like this but it must be some cold
> air thing for it to act this way only in cold months. Any ideas are welcome.

  #3  
Old November 5th 05, 08:46 PM
Comboverfish
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Default 2001 ford 4.0 cold idle issue


grimB wrote:
> I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
> when its about 40F outside idle acts like it wants to stall. I can baby it
> and get it running again after it stalls like this but it must be some cold
> air thing for it to act this way only in cold months. Any ideas are welcome.


You most likely are experiencing leakage past your upper plenum orings,
and to a lesser extent, lower intake manifold oring gaskets. Your
problem may still be in the early stages of failurre where no trouble
codes have set, but you still get an occasional cold stall or idle
fluctuation.

Cleaning or replacing the IAC is cheap enough to do -- they do fail
quite often -- but you need to get ahold of a Ford dealer and see if
your VIN and mileage allow you to qualify for the intake gasket
replacement recall. I don't know what the recall's mileage cap is, but
a 2001 4.0 V6 should qualify for the repair.

Toyota MDT in MO

  #4  
Old November 5th 05, 09:25 PM
grimB
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Posts: n/a
Default 2001 ford 4.0 cold idle issue

thx.
I may try the IAC myself before going to the trouble of taking it to a
dealer. aka scheduling the appt, alternate transportation for the day etc.


"Comboverfish" > wrote in message
ups.com...
>
> grimB wrote:
> > I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
> > when its about 40F outside idle acts like it wants to stall. I can baby

it
> > and get it running again after it stalls like this but it must be some

cold
> > air thing for it to act this way only in cold months. Any ideas are

welcome.
>
> You most likely are experiencing leakage past your upper plenum orings,
> and to a lesser extent, lower intake manifold oring gaskets. Your
> problem may still be in the early stages of failurre where no trouble
> codes have set, but you still get an occasional cold stall or idle
> fluctuation.
>
> Cleaning or replacing the IAC is cheap enough to do -- they do fail
> quite often -- but you need to get ahold of a Ford dealer and see if
> your VIN and mileage allow you to qualify for the intake gasket
> replacement recall. I don't know what the recall's mileage cap is, but
> a 2001 4.0 V6 should qualify for the repair.
>
> Toyota MDT in MO
>



  #5  
Old November 5th 05, 09:33 PM
Shep
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Posts: n/a
Default 2001 ford 4.0 cold idle issue

I believe some tsb issues with iac, seem to remember have run into this
about 4 months ago similar symptoms, Combover's issues are possible also. A
full scan may help looking at fuel trims for the intake leak diagnosis.
"Comboverfish" > wrote in message
ups.com...
>
> grimB wrote:
>> I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
>> when its about 40F outside idle acts like it wants to stall. I can baby
>> it
>> and get it running again after it stalls like this but it must be some
>> cold
>> air thing for it to act this way only in cold months. Any ideas are
>> welcome.

>
> You most likely are experiencing leakage past your upper plenum orings,
> and to a lesser extent, lower intake manifold oring gaskets. Your
> problem may still be in the early stages of failurre where no trouble
> codes have set, but you still get an occasional cold stall or idle
> fluctuation.
>
> Cleaning or replacing the IAC is cheap enough to do -- they do fail
> quite often -- but you need to get ahold of a Ford dealer and see if
> your VIN and mileage allow you to qualify for the intake gasket
> replacement recall. I don't know what the recall's mileage cap is, but
> a 2001 4.0 V6 should qualify for the repair.
>
> Toyota MDT in MO
>
>




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  #6  
Old November 5th 05, 10:58 PM
Comboverfish
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Posts: n/a
Default 2001 ford 4.0 cold idle issue


Shep wrote:
> I believe some tsb issues with iac, seem to remember have run into this
> about 4 months ago similar symptoms, Combover's issues are possible also. A
> full scan may help looking at fuel trims for the intake leak diagnosis.
> "Comboverfish"


Correct. I just assumed that the OP would not benefit from my going
into detail, but yes, look for cold temp total fuel trim numbers that
are high positive but below the threshold of setting a P0171/P0174, ie
~15% to 30%. The intake problem more likely is the issue as colder
temps don't affect IAC operation nearly as much. (they're just junk
parts to begin with )

Toyota MDT in MO

  #7  
Old November 5th 05, 11:22 PM
Shep
external usenet poster
 
Posts: n/a
Default 2001 ford 4.0 cold idle issue

Dead on about the OP's unknown tech ability, as we all see here this is
tough to tell how far to go with the info, maybe at times more harm than
good to overdo it.
"Comboverfish" > wrote in message
ups.com...
>
> Shep wrote:
>> I believe some tsb issues with iac, seem to remember have run into this
>> about 4 months ago similar symptoms, Combover's issues are possible also.
>> A
>> full scan may help looking at fuel trims for the intake leak diagnosis.
>> "Comboverfish"

>
> Correct. I just assumed that the OP would not benefit from my going
> into detail, but yes, look for cold temp total fuel trim numbers that
> are high positive but below the threshold of setting a P0171/P0174, ie
> ~15% to 30%. The intake problem more likely is the issue as colder
> temps don't affect IAC operation nearly as much. (they're just junk
> parts to begin with )
>
> Toyota MDT in MO
>
>




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----= East and West-Coast Server Farms - Total Privacy via Encryption =----
  #8  
Old November 6th 05, 04:08 AM
ed
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Posts: n/a
Default 2001 ford 4.0 cold idle issue

http://www.ford-trucks.com/article/i...r_IAC_Fix.html

may help....




"grimB" > wrote in message
news:Ad7bf.9067$Ny6.8570@trnddc06...
> I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
> when its about 40F outside idle acts like it wants to stall. I can baby it
> and get it running again after it stalls like this but it must be some

cold
> air thing for it to act this way only in cold months. Any ideas are

welcome.
>
>



  #9  
Old November 6th 05, 08:02 PM
grimB
external usenet poster
 
Posts: n/a
Default 2001 ford 4.0 cold idle issue

Hard to see in the pic, but can anyone tell me if that valve is supposed to
be 100% closed when its at rest? Mine sure isnt. Even after cleaning it,
its not.

The local parts place doesnt have one in stock I can look at but I will sure
change it if I need to.



"ed" > wrote in message
news:ftebf.8683$An6.3518@trnddc08...
>

http://www.ford-trucks.com/article/i...r_IAC_Fix.html
>
> may help....
>
>
>
>
> "grimB" > wrote in message
> news:Ad7bf.9067$Ny6.8570@trnddc06...
> > I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year except
> > when its about 40F outside idle acts like it wants to stall. I can baby

it
> > and get it running again after it stalls like this but it must be some

> cold
> > air thing for it to act this way only in cold months. Any ideas are

> welcome.
> >
> >

>
>



  #10  
Old November 6th 05, 11:20 PM
grimB
external usenet poster
 
Posts: n/a
Default 2001 ford 4.0 cold idle issue

thanks for the info everyone.
good forum.



"lugnut" > wrote in message
...
> On Sun, 06 Nov 2005 19:02:44 GMT, "grimB"
> > wrote:
>
> >Hard to see in the pic, but can anyone tell me if that valve is supposed

to
> >be 100% closed when its at rest? Mine sure isnt. Even after cleaning it,
> >its not.

>
> No. It is slightly open all the time when the engine is
> off. The solenoid opens it to increase idle speed or the act
> as a dash pot. When the engine is dead, there is no vacuum
> to close it the rest of the way and gives the engine a bit
> more air during starting. This helps with those multitudes
> of throttle bodies that are sludged shut. As soon as the
> engine starts, the ECM takes over along with the force of
> engine vacuum. If you are cleaning it, use a small
> screwdriver to make sure the valve moves easily a short
> distance. Do not force it.
>
> Lugnut
>
> >
> >The local parts place doesnt have one in stock I can look at but I will

sure
> >change it if I need to.
> >
> >
> >
> >"ed" > wrote in message
> >news:ftebf.8683$An6.3518@trnddc08...
> >>

>
>http://www.ford-trucks.com/article/i...plorer_IAC_Fix.

html
> >>
> >> may help....
> >>
> >>
> >>
> >>
> >> "grimB" > wrote in message
> >> news:Ad7bf.9067$Ny6.8570@trnddc06...
> >> > I have a 2001 ford 4.0L SOHC in a sporttrak runs great all year

except
> >> > when its about 40F outside idle acts like it wants to stall. I can

baby
> >it
> >> > and get it running again after it stalls like this but it must be

some
> >> cold
> >> > air thing for it to act this way only in cold months. Any ideas are
> >> welcome.
> >> >
> >> >
> >>
> >>

> >

>



 




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