DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum (http://www.ramforumz.com/index.php)
-   Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 (http://www.ramforumz.com/forumdisplay.php?f=13)
-   -   Rpms rev on start up (http://www.ramforumz.com/showthread.php?t=91813)

XC450 09-12-2011 06:38 PM

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?

GTyankee 09-12-2011 06:49 PM

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 ??

snrusnak 09-13-2011 10:02 AM

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?


All times are GMT -4. The time now is 06:04 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
vB.Sponsors
= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger