Idle RPM from the factory?

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07-15-2011, 03:01 AM

LOBO2

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Idle RPM from the factory?

Does anyone know at what RPM the warm engine idle is set at from the factory? The truck is a 2004 5.3L?

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07-15-2011, 07:05 AM

oldred95

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The stock file for my 99 says 575 in park/neutral and 525 in gear. A 2002 says its 575 in park/neutral and in gear. I idle mine at 625 in park and 600 in gear to help keep the alternator output a little higher when the fans are on. At the same time I don't get that annoying roll back anymore when taking off on an incline.

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07-15-2011, 11:06 AM

LOBO2

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Thanks! Where did you find this info?

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07-15-2011, 05:52 PM

oldred95

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I have EFI live and I looked at my stock 99 file and a stock 2002 file and what I am running now which is a modified 2002 file.

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07-15-2011, 10:55 PM

06Sierra2

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just throw a cam in there and set the idle to like 750 lol. but mine idled about 575 in park when it was stock as well.

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07-15-2011, 11:42 PM

budhayes3

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Quote:

Originally Posted by oldred95

The stock file for my 99 says 575 in park/neutral and 525 in gear.

I can confirm this...I remember looking at my live data with a scan tool back when my truck was stock and that's where my idle was

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07-16-2011, 03:05 AM

LOBO2

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Thanks all. I didn't know if it came from a manual or online somewhere. I did a lot of searching online, but couldn't find anything.

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07-16-2011, 07:23 AM

Atomic

I have a gauge for that

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Code:

Labels	-40	-18	3	25	46	68	90	111	133	154	176	198	219	241	262	284
In Gear AC off	802.5	802.5	802.5	802.5	800.0	777.5	755.1	707.4	687.5	667.6	637.5	587.5	587.5	587.5	625.0	625.0
In Gear AC on	800.0	800.0	800.0	800.0	794.9	750.0	755.1	732.6	712.5	692.6	662.5	612.5	612.5	612.5	650.0	637.5
P/N AC off	802.5	802.5	802.5	802.5	800.0	777.5	755.1	707.4	687.5	667.6	650.0	600.0	600.0	600.0	625.0	625.0
P/N AC on	800.0	800.0	800.0	800.0	794.9	750.0	755.1	733.8	712.5	692.6	675.0	625.0	625.0	625.0	650.0	637.5

Top labels are engine temp in F