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We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.

Engine revs all the way up on start up for a second then drops down to idle

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Hi I just finished a swap in my 1991 Chevy in which I put a 24 valve cummins and now when I go to start the truck it revs way up and then right to I’d and this all happens within like a second or 2 and I’m not sure what it is, has anyone experienced anything like this, any help is appreciated!

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Oley. Welcome. I get through there quite a bit. Beautiful area.

Does it rev up all the way and then settle in to an idle and work fine after that? If so I would think a leaky injector(s) or turbo leaking fuel or oil respectively over time and burning that off on startup. A form of a runaway.

A 24v in a swap can be a chore with the electronics. How are you controlling the APPS? Not sure if you have a way to read codes but if you can start there.

Edited by dave110

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.