Warming Up
12-17-2010, 01:25 PM
#41
Guys
Wonder if i could trouble you for opinions on warming up the car on a cold morning. Currently my process is, start car and drive off, but keep revs to 2K or under until the temp gauge is at normal operating temperature.
I am not sure if the 07 GT has a CAT as standard, but i have heard that if you have a CAT you shouldnt let your car idle for warming up.
I have also been advised (from my motorbiking days) not to let the rev counter climb to far on a cold engine, let the engine warm up a bit, hence my 2K rev limit until warm.
What do others do?
Thanks Graeme
Wonder if i could trouble you for opinions on warming up the car on a cold morning. Currently my process is, start car and drive off, but keep revs to 2K or under until the temp gauge is at normal operating temperature.
I am not sure if the 07 GT has a CAT as standard, but i have heard that if you have a CAT you shouldnt let your car idle for warming up.
I have also been advised (from my motorbiking days) not to let the rev counter climb to far on a cold engine, let the engine warm up a bit, hence my 2K rev limit until warm.
What do others do?
Thanks Graeme
It is best practice to let your vehicle warm up during cold weather. Also, your Owner Guide states the following info under the “Driving” section on page 158:
Important safety precautions
A computer system controls the engine’s idle revolutions per minute
(RPM). When the engine starts, the idle RPM runs higher than normal in
order to warm the engine. If the engine idle speed does not slow down
automatically, have the vehicle checked. Do not allow the vehicle to idle
for more than 10 minutes at the higher engine RPM.
Hope this helps.
Deysha
12-17-2010, 02:54 PM
#42
4th Gear Member
Join Date: Mar 2006
Location:
Posts: 1,470
Please read #3 in the following link.
http://media.ford.com/article_displa...ticle_id=28946
12-17-2010, 04:09 PM
#43
4th Gear Member
Join Date: Nov 2008
Location: California
Posts: 1,495
Gotta respectfully disagree, because your own website also disagrees.
Please read #3 in the following link.
http://media.ford.com/article_displa...ticle_id=28946
Please read #3 in the following link.
http://media.ford.com/article_displa...ticle_id=28946
"How long should my car warm up on a cold day?"
"All it takes is a matter of seconds. 'The myth that you should let your car idle for five to 10 minutes before driving to protect the engine is completely false,' says Brett Hinds, advanced engine design and development manager for Ford. Even at temperatures as low as -20 degrees, your gasoline engine has full lubrication and is ready to go within five seconds of ignition. For best warm-up and fuel economy, a vehicle should be driven as soon as it's ready, adds Hinds." Then there is some further information about warming hybrid engines. Then, "In all vehicles, the cabin and the windshield may take a bit longer than the engine to heat up, so don't forget your scarf."
12-18-2010, 03:44 PM
#47
Cut & Paste Expert
Join Date: May 2007
Location: NW Arkansas
Posts: 13,322
Owners Manual says start her and go.
I wait until the fuel system goes from open loop to closed loop mode.
This happens when the O2 sensors are up to temp and sending valid
readings to the PCM.
Modern engines dont care about warming up periods.
Thats old school.
I wait until the fuel system goes from open loop to closed loop mode.
This happens when the O2 sensors are up to temp and sending valid
readings to the PCM.
Modern engines dont care about warming up periods.
Thats old school.
12-19-2010, 08:13 AM
#48
6th Gear Member
Join Date: Feb 2007
Location: state of confusion
Posts: 7,635
Sorry if I'm not convinced about this part.
The physical phenomena of differential expansion and unequal heating of parts hasn't changed in the meantime. If it had, I might have had to find different employment.
"New school/just replace it" attitudes seem to involve not worrying about why you might have to replace something, or how to avoid having to (just live in the moment). Sure, some or maybe even most folks can get away with this. But wouldn't it really suck to be the one guy in ten, or a hundred, or a thousand who couldn't.
Maybe an engine is a little like Forrest Gump's box of chocolates, where you don't know what you're going to get.
Norm
The physical phenomena of differential expansion and unequal heating of parts hasn't changed in the meantime. If it had, I might have had to find different employment.
"New school/just replace it" attitudes seem to involve not worrying about why you might have to replace something, or how to avoid having to (just live in the moment). Sure, some or maybe even most folks can get away with this. But wouldn't it really suck to be the one guy in ten, or a hundred, or a thousand who couldn't.
Maybe an engine is a little like Forrest Gump's box of chocolates, where you don't know what you're going to get.
Norm
Last edited by Norm Peterson; 12-19-2010 at 08:15 AM.
12-19-2010, 09:31 AM
#50
Agree as well Norm. Engines may have changed over the years, but metallurgy has not. At colder temps metal is more brittle and under sudden load has more of a chance to break or fail. For that reason alone, I will always warm my engine approx 3-5 mins on cold mornings before putting a load on it.
Now i'm not saying u can't run butt cold, just saying that you do run a higher risk of failure over the course of time by doing it over and over in cold weather.
just my 02.
Now i'm not saying u can't run butt cold, just saying that you do run a higher risk of failure over the course of time by doing it over and over in cold weather.
just my 02.