2018 6.7L Backfire?
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Joined: Sep 2020
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2018 6.7L Backfire?
Is this a back fire and should I be worried? No response on my thump thread so maybe if I ask it this way. Cruising 60mph - 80mph my 2018 (115,000 mi.) truck is making an occasional thump or dull muffled pop. Sounds like a backfire coming from the engine and usually on the right side. No change in performance or boost. It happens mainly when I use cruise control on level road at 60+mph but not always. At first I thought it was the 1" thick rubber bed rug being picked up on the corner and then falling back down so I removed the rug; Still get the thump. There's nothing obviously loose in the front like a flopping panel or anything. I don't know whether to be alarmed or not. Anyone had this before?
Mountain Pass
Joined: Dec 2019
Posts: 249
Likes: 10
Maybe the torque converter or something in the tranny? I had a 2012 F150 that had a tranny problem that felt like a misfire. Never figured it out after several trips to the dealer. It started at around 15,000 miles and was much worse when I traded it at 60,000 or so.
Tuned
Joined: Jul 2011
Posts: 396
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From: Wherever the RV is parked
Do you have OEM front mud flaps? Mine would flex and make a thumping sound.. They also had about a 4" - 5" tear that let them flex more at speed.
Don't have them or the thumping anymore.
Don't have them or the thumping anymore.
Cargo Master
Joined: Oct 2005
Posts: 2,866
Likes: 515
From: WNY
Diesels do not backfire.
Probably a simple turbo huff of spinning ultra fast under hard throttle and then a cut off of exhaust mass from lifting.
They all do it.
Probably a simple turbo huff of spinning ultra fast under hard throttle and then a cut off of exhaust mass from lifting.
They all do it.
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Tried that based on the other threads here. It only pops at low load like cruise control on level terrain with minimum boost.
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