6.7L Cummins Forum

I just took mine to the dealer I bought it from and asked to have it turned on. No charge for the service.

I paid $30 to have the fast idle enabled, but feel it was worth the money. We use the fast idle, rather than letting it idle, when stopping after towing the fiver in order for the turbo to cool down. The manual recommends up to five minutes idling to allow the turbo to cool in order to protect the seals. The EGT probe (Edge insight) is installed in the exhaust manifold and we wait for the temps to drop below 400 degrees before shutting her down. When towing the EGT is usually between 11-1200 degrees and when climbing steep hills it can reach 1375, and I have seen it above 1500 for short periods of time when coming out of regen.

i have dpf delete and egr and cooler delete. when would the fast idle be needed?

PTO stuff and warm up, but it will kick into high idle on it's own in cold weather.

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2008 Dodge 2500HD 6.7L 4X4 Laramie
Edge insight, Amp tailgate step, 4" Boss Bars, rear air bags with compressor, spray in bed liner

thank you for reply!

Is the high idle a feature that you can turn on and off after the dealer enables it?

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2008 Dodge 2500 4x4 6.7L Quad Cab. K&N filter. H&S DPF delete (turbo back). EGR disconnected. Mini Maxx tuner (running on 120hp setting). B&W hideaway hitch.

Yes. Like someone posted in the first few threads, it's enabled through the cruise control. Turn cruise on, set speed and your done. To turn it off, turn cruise off or press the brake.