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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 10-19-2013, 12:20 PM
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Default Tuning issue

I posted this issue in the 2012 section and didn't get much response so I'm hoping more people will see it here. Anyway I have a diablo tuner with the Hemifever tune. I bumped the idle up to 600 rpm with the ac off. When I stop at a traffic light or stop sign the rpm still drops to 500. If I bump the pedal a little it comes back up to 600. I talked to a tech at Diablosport and he said the pcm was overriding the tune. That's all he could tell me. Has anyone else had this issue? If so what will correct this? Thanks.
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Old 10-19-2013, 01:48 PM
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had it since day one (stock,canned,custom) until i removed my AC but i have a 3G.
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Old 10-19-2013, 02:50 PM
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Quote:
Originally Posted by DWWHemiguy View Post
I posted this issue in the 2012 section and didn't get much response so I'm hoping more people will see it here. Anyway I have a diablo tuner with the Hemifever tune. I bumped the idle up to 600 rpm with the ac off. When I stop at a traffic light or stop sign the rpm still drops to 500. If I bump the pedal a little it comes back up to 600. I talked to a tech at Diablosport and he said the pcm was overriding the tune. That's all he could tell me. Has anyone else had this issue? If so what will correct this? Thanks.
Does yours do it also only when the AC is off? I have the same problem but a little more drastic. Mine would go from 750 down to 4xx and back to 9xx. To see if its the tune or not maybe try loading up a canned tune and see if it still does it. A different tuner told me my issue was throttle sensitivity. I don't know if this will help or not but maybe this will spark an idea to help the issue.
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Old 10-19-2013, 03:23 PM
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Quote:
Originally Posted by ericlee9386 View Post
Does yours do it also only when the AC is off? I have the same problem but a little more drastic. Mine would go from 750 down to 4xx and back to 9xx. To see if its the tune or not maybe try loading up a canned tune and see if it still does it. A different tuner told me my issue was throttle sensitivity. I don't know if this will help or not but maybe this will spark an idea to help the issue.
It only does this with the ac off. Before the tune it would idle at 500 with ac off and about 700 with ac on. On the stock tune if I bumped the pedal it wouldn't stay up. Now it will but only if I tap the pedal a little. Also I have my throttle sensitivity as high as it will go. I tried raising the idle with ac off 200 rpm to 700 but it would still drop to 500 with the ac turned off right after coming to a stop. When I tapped the pedal it would go to 700 and stay.

Last edited by DWWHemiguy; 10-19-2013 at 03:26 PM.
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Old 10-20-2013, 10:24 AM
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I don't mess with the idle in Diablo anymore.... Everytime I bumped it a 100rpm it would idle above 1000rpm.
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Old 10-20-2013, 11:27 AM
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Quote:
Originally Posted by Fasthemiram11 View Post
I don't mess with the idle in Diablo anymore.... Everytime I bumped it a 100rpm it would idle above 1000rpm.
Mine idles where I set it but when I stop it drops to 500 rpm. I have to tap the pedal to get it back to 600.
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Old 10-24-2013, 10:15 PM
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A couple of days ago I emailed Sean at Hemifever and he didn't even know what to do. Is there any way to adjust the idle on these drive by wire throttle bodies? Someone has to know a way to do it.

Last edited by DWWHemiguy; 10-24-2013 at 10:18 PM.
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Old 10-25-2013, 10:39 PM
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Try this guy he is very knowledgeable. mike@ostdyno.com
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Old 10-26-2013, 04:02 PM
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i have a intune with hemifever what is the benefit of upping the idle?
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Old 10-26-2013, 06:45 PM
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Quote:
Originally Posted by brondondolon View Post
i have a intune with hemifever what is the benefit of upping the idle?
There really is none I don't think. Mine was raised just to help my cam idle.
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