Idle RPMs - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 10-24-2007, 01:50 PM Thread Starter
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Idle RPMs

Ok, just a simple question. At idle what should a completely stock trucks RPM be, and how much should it fluctuate? Thanks

1996 F250 XLT
Build date 09/95

Regular Cab Automatic 4x4
Fey, Rear 10,000lb Stainless Bumper
S&B Intake
4inch Custom Exhaust with MBRP Downpipe and Muffler.
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post #2 of 9 Old 10-24-2007, 02:11 PM
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should be around 600 give or take 50rpm. some will flutter 25 to 75 sittin there. on mine its is pretty stable but I would say 20-30 r difference.

2001 F-250 X-Cab 4X4, Edge EVO, DIY Tymar, Map Fooler, FPR Shimmed, 4" exhaust into 7" GR Bullhauler stacks, 3.5" fabtech lift,35x12.50 procomps, 18" DEJ cannon wheels, Custom built RobTrans, HD U-joints, Trip A-pillar Guages, 2 12" rockford subs 1500watt rockford amp and Eclipse head unit, More to come!
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post #3 of 9 Old 10-24-2007, 02:14 PM
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ok after a quick plug in of the good ol NGStar tester, it reads that desired idle rpm is 678. my truck idles between 620 and 700. fresh and hot off the road with the "factory ford" scan tool hooked up.

2001 F-250 X-Cab 4X4, Edge EVO, DIY Tymar, Map Fooler, FPR Shimmed, 4" exhaust into 7" GR Bullhauler stacks, 3.5" fabtech lift,35x12.50 procomps, 18" DEJ cannon wheels, Custom built RobTrans, HD U-joints, Trip A-pillar Guages, 2 12" rockford subs 1500watt rockford amp and Eclipse head unit, More to come!
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post #4 of 9 Old 10-24-2007, 03:10 PM Thread Starter
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Ok thanks, I had noticed some fluctuation in mine, but it seems to be within that range

1996 F250 XLT
Build date 09/95

Regular Cab Automatic 4x4
Fey, Rear 10,000lb Stainless Bumper
S&B Intake
4inch Custom Exhaust with MBRP Downpipe and Muffler.
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post #5 of 9 Old 10-24-2007, 10:29 PM
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manual or auto? my auto idles at 1000. always has. should I be looking to lower it?

Jason Renville
Hutto, Texas

94.5 F350 OBS Dually PSD
190k+
10K mod. 3" downpipe
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post #6 of 9 Old 10-25-2007, 01:54 PM Thread Starter
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Mines an automatic.

1996 F250 XLT
Build date 09/95

Regular Cab Automatic 4x4
Fey, Rear 10,000lb Stainless Bumper
S&B Intake
4inch Custom Exhaust with MBRP Downpipe and Muffler.
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post #7 of 9 Old 10-25-2007, 04:46 PM
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Quote:
Originally Posted by 999renville View Post
manual or auto? my auto idles at 1000. always has. should I be looking to lower it?
isn't 1k too, but quite too high? mine is auto and she idles almost at 700...
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post #8 of 9 Old 10-25-2007, 05:07 PM
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Quote:
Originally Posted by French_Toast View Post
Mines an automatic.
You may want to pull codes. You probably have a bad sensor or someone has added an idle mod sometime.

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post #9 of 9 Old 11-26-2007, 02:07 PM
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What sensor could cause that?

Mine just started doing this when the weather got cold, if it sits warming up for a few minutes or longer the idle jumps to 1k ... besides the intake everything else is stock to my knowledge ...
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