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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 09-12-2011, 06:38 PM
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Default Rpms rev on start up

My little brother has a 2003 4.7 all stock except for a cat-back exhaust and a lot of miles

When he starts the truck, it revs to about 2100 rpms for 3 to 4 seconds before idling back down

Any ideas?
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Old 09-12-2011, 06:49 PM
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that seems a bit high to me, but i don't have any idea what it should rev up to
is this every start or just when it has not been started for a longer time ??
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Old 09-13-2011, 10:02 AM
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Well normally it should rev to around 1,000 to 1,500 rpm or so when started, maybe a little less, especially on cold start. On cold start it should hold that rpm for so many seconds, then gradually come back down to low idle over a minute or a few minutes. 2,100 rpm seems high...any check engine lights? Drives normal?
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