Why does my truck always go to high idle even after mini maxx - Ford Powerstroke Diesel Forum
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Old 12-29-2011, 07:29 PM
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Why does my truck always go to high idle even after mini maxx

Since I have bought this truck new my truck has always done this. I added a mini maxx earlier this year and still does it. Can I keep it from doing this? Just to answer one question yes mine came with the snow plow package. Mine seems to go into high idle after it runs for 30-60 seconds. Then you have to go hit the brakes and it returns to regular idle. Then after 30-60 seconds again it does it it again until you hit the brake pedal. How can I keep it from always going into high idle? Because I'm trying to stop it. LOL
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Old 12-29-2011, 08:17 PM
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What's your coolant temp and your oil temp? What's the ambient air temp?
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Old 12-29-2011, 08:28 PM
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high idle is to help the engine warm up when its cold out
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Old 12-29-2011, 08:29 PM
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Not sure why you'd want to stop it but I'd think if you contact your tuner they could write one for you without high idle?
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Old 12-30-2011, 10:25 AM
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It is programmed from the factory to do so when it's cold outside as mentioned above. As far as I know h&s programming does nothing to overwrite it nor would you want it to really. Mine will usually sit around 1k rpm when it's cold out, or 1200rpm with the high idle/aux mod.
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Old 12-30-2011, 11:09 AM
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totally normal, quit hitting the brakes
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Old 01-01-2012, 01:17 PM
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Ok so when it gets warm when is it suppose to stop? Because it stays there.... I will have to check the temperatures next time but I went on a 2 hour trip a couple weeks ago it was mid 50's and I go to sheetz to get a drink and there it is in the parking stull acting like it's ticked off.
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Old 01-01-2012, 01:35 PM
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The PCM decides high idle based on PIDs like EOT, ECT, and some others I'm sure. Once the conditions for high idle are no longer met, it won't do it.
If it still is after a 2 hr drive then probably something else is going on.
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Old 01-01-2012, 01:53 PM
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Quote:
Originally Posted by skipnay View Post
Ok so when it gets warm when is it suppose to stop? Because it stays there.... I will have to check the temperatures next time but I went on a 2 hour trip a couple weeks ago it was mid 50's and I go to sheetz to get a drink and there it is in the parking stull acting like it's ticked off.
it goes off of outside temp too. it will keep the idle up to keep the truck from cooling off
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