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Post by Marc on Jan 19, 2020 12:43:23 GMT -6
I recently found that my 2001 4.0 warms up much faster and puts out good heat when I hold it to 2000 - 2200 RPM for about 6 to 7 minutes at a cold start. Question: how much extra gas would it be using then?
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mrn65
Aurora Groupie
Posts: 119 
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Post by mrn65 on Jan 19, 2020 18:23:34 GMT -6
That's a good question.....I would think if you pull up the "Avg. Gas usage" on the "DIC" you can watch how much the mileage falls off while you're sitting warming up the car.
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RCA1186
Administrator 
Rob
Go Pack Go!
Posts: 4,838
Staff Member
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Post by RCA1186 on Jan 20, 2020 7:31:02 GMT -6
Well, cold starts are close to 1000rpm at normal idle, so I'd think it would be about double what it usually uses. I also think the car runs much more rich when cold as well.
Of course the quickest way to warm it up is to drive it. Best bet is to start it and let it run for a minute or so to get the oil flowing and then get going.
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Post by Marc on Jan 20, 2020 9:07:23 GMT -6
Gentlemen....Thank you.
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Post by fatcity on Jan 24, 2020 20:04:38 GMT -6
I feel it is best to warm petroleum fluids slowly . When the engine runs, power steering, and Automatic transmission fluid are also warmed by internal friction . After a minute or two, your ready to roll . Not to argue, but your procedure isn't best for the car . PS Have you ever seen a warmer car ? Takes a bit to warm up, interior stays warm all day .
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Post by Marc on Jan 25, 2020 9:07:58 GMT -6
Not to argue, but your procedure isn't best for the car . I realized that & I now let it warm up at a normal idle.....no revving. |
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Post by emarkay on Jun 20, 2020 15:33:28 GMT -6
0 mph equals 0 MPG.
Depends upon the ambient temperature. I'd let the thing do its own idle down to curb idle(it is on pre-programmed warm-up strategy), generally speaking only a minute or so.
Then it's okay to add throttle when the vehicle is not moving but again, don't turn on the heat! Remember your heater core is it mini radiator, let the engine heat itself up until gauge moves, then turn the heat on.
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