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Old Oct 11, 2004 | 11:03 AM
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automatic idle-up

When I first got my 2001 PSD with 3.5 inch down pipe with 4 inch back, Micro-tuner programer,K&N air filter and housing, and a power-aid spacer plate.

I would let it idle for about 5 min. and it would automaticly idle up a little. Now it does not do it.Does any one now anything about this? Is it good or bad?
 
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Old Oct 11, 2004 | 12:27 PM
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What was the temp out when it would idle-up, it should only do it if it thinks it needs to warm up quicker due to the temp outside.

refuse2
 
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Old Oct 11, 2004 | 02:55 PM
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It ranged between 30 to 60 deg. F
 
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Old Oct 11, 2004 | 05:41 PM
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it should idle up at 30 but not 60.
 
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Old Oct 11, 2004 | 05:42 PM
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Your programmer might have over-written the code for the fast idle. A chip or programmer can/will do that.
 
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Old Oct 11, 2004 | 08:42 PM
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Is it any thing to worry about if it does not work?
 
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Old Oct 11, 2004 | 08:46 PM
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I would just say a little longer warm up's but most people if they pull the turbo off they gut it anyway to get the lower egt's and some are rewiring them to use them as an exhaust brake so the choice is yours.

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Old Oct 11, 2004 | 10:00 PM
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Originally Posted by refuse2
I would just say a little longer warm up's but most people if they pull the turbo off they gut it anyway to get the lower egt's and some are rewiring them to use them as an exhaust brake so the choice is yours.

refuse2
The exhaust backpressure valve is not what causes it to idle up. That is purely a function of the PCM. If the outside air temp is above 40*F it will not fast idle. There are other parameters as well..EOT, ECT, etc., but the outside temp is the primary factor.
 
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Old Oct 12, 2004 | 03:11 AM
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You don't have to worry about it if your truck doesn't idle faster when it's cold out. Those of us with the older trucks have been living with it for years.
 
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Old Oct 13, 2004 | 09:09 PM
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Thanks for the replys I appreciate the info.
 

Last edited by rdspider; Oct 13, 2004 at 09:10 PM. Reason: misspell
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