engine shut down descending steep grade
Lead Driver
Joined: Dec 2013
Posts: 9,762
Likes: 115
Interesting.. I always thought using CC and TH was the best way to go. Let the computer do the thinking for you.
69cj - Remember we have a better exhaust brake in the 2015 and other engine parameters are different. My 2015 holds a hill better than my 2011 did.
Wondering if that new adjustable exhaust brake controller for the 2011 - 2014 may be worth it if you tow a lot.
Glad it wasn't something very costly for you Marine57_4.
69cj - Remember we have a better exhaust brake in the 2015 and other engine parameters are different. My 2015 holds a hill better than my 2011 did.
Wondering if that new adjustable exhaust brake controller for the 2011 - 2014 may be worth it if you tow a lot.
Glad it wasn't something very costly for you Marine57_4.
Thread Starter
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Cross-Country
Joined: Aug 2010
Posts: 86
Likes: 1
i do not know, but i will take it off cc when i start my descent. maybe the 5 mph is the difference but i do not want to take a chance unless i am on the road alone. my pickup is a dually cc, 4wd, with 373 gears and am pulling a 37 foot 5er weighing in at about 16-17k.
Thread Starter
|
Cross-Country
Joined: Aug 2010
Posts: 86
Likes: 1
Interesting.. I always thought using CC and TH was the best way to go. Let the computer do the thinking for you.
69cj - Remember we have a better exhaust brake in the 2015 and other engine parameters are different. My 2015 holds a hill better than my 2011 did.
Wondering if that new adjustable exhaust brake controller for the 2011 - 2014 may be worth it if you tow a lot.
Glad it wasn't something very costly for you Marine57_4.
69cj - Remember we have a better exhaust brake in the 2015 and other engine parameters are different. My 2015 holds a hill better than my 2011 did.
Wondering if that new adjustable exhaust brake controller for the 2011 - 2014 may be worth it if you tow a lot.
Glad it wasn't something very costly for you Marine57_4.
Thread Starter
|
Cross-Country
Joined: Aug 2010
Posts: 86
Likes: 1
oh, ok. no, it was not ehb. the engine over reved because i was going to fast downhill when it shifted down to 2nd gear.
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Junior User
Joined: Feb 2004
Posts: 63
Likes: 0
From: St. John's Newfoundland
I had a similar experience three days ago after descending a relatively short 7% grade in my 2011 6.7L. Towing a 13,000 lb 5th wheel. In TH with CC on and set for 60 mph. Got down to 3rd gear and about 3500 rpm. Held at 64 mph. Never touched the brakes. At the bottom of the hill engine briefly went into overspeed. Then the wrench came on followed by reduced power message. Truck began to slow and would not respond to throttle. Barely able to pull onto shoulder with 5th wheel. Engine died. I was in Northern Ontario with no cell phone signal! After reading the manual and waiting about twenty minutes decided to start the engine. All messages cleared but CEL on. Drove about thirty miles to campground and shut off engine. When restarted CEL was off. Checked codes with scanner and only code was P0219 - Engine overspeed. Whew!
Posting Guru
Joined: Aug 2007
Posts: 1,902
Likes: 26
From: BA, OK
My guess would be between 3500 and 4000. Had mine at 3500 briefly by accident (had upper gears locked out during hard acceleration) the engine was hesitating or de-powering so to speak on it's own, looked down at the guages and 4-6 was locked out @ 3500rpm.
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