Why does my truck "burp" while idling? - Dodge Cummins Diesel Forum
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post #1 of 15 (permalink) Old 02-15-2019, 10:34 AM Thread Starter
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Why does my truck "burp" while idling?

I've noticed my 2018 has little hiccups every 30 seconds or so while high idling. If its cold out and you start the truck, exhaust brake on for fast warmup, the engine idles around 1000 or 1100, nice and smooth but with little burps or hiccups every so often. Done it since new.

Is this normal?


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post #2 of 15 (permalink) Old 02-15-2019, 04:50 PM
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Mine used to vary about 50rpm periodically on cold mornings. Pretty sure it was the grid heater. Doesn’t do it any more though, ever since that darn grid heater ran away with my throttle valve and intake elbow to go looking for the EGR cooler...


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post #3 of 15 (permalink) Old 02-15-2019, 09:48 PM
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It's normal, the more you mod these trucks the more angry they get in the winter

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post #4 of 15 (permalink) Old 02-17-2019, 01:41 PM Thread Starter
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My truck is completely stock. El Pozzinator is right...sitting in the truck the burps happen when the headlights dim...grid heater.

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post #5 of 15 (permalink) Old 02-17-2019, 03:17 PM
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I would just get rid of it. Varying 50 rpm's dimming Head lights and burping is a good sign that it's wearing out and will explode. Comparing to your Power Stroke anyways. Stupid Cummins.

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post #6 of 15 (permalink) Old 02-17-2019, 06:36 PM Thread Starter
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Quote:
Originally Posted by N of 60 View Post
I would just get rid of it. Varying 50 rpm's dimming Head lights and burping is a good sign that it's wearing out and will explode. Comparing to your Power Stroke anyways. Stupid Cummins.
Guess I couldn’t help but notice the Powerstroke doesn’t dim the headlights or have those little burps. This is my first Cummins. Obviously I don’t think the engine is going to explode, but it’s fair to say these are annoyances the Ford doesn’t have.

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post #7 of 15 (permalink) Old 02-17-2019, 08:28 PM
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It’s possibly your ac compressor cycling on on off.

Possibly the grid heater.

Possibly your brain trying to find a reason to go buy another ford.

Possibly aliens.

My moneys on aliens.
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post #8 of 15 (permalink) Old 02-17-2019, 10:38 PM
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Quote:
Originally Posted by troverman View Post
Guess I couldn’t help but notice the Powerstroke doesn’t dim the headlights or have those little burps. This is my first Cummins. Obviously I don’t think the engine is going to explode, but it’s fair to say these are annoyances the Ford doesn’t have.
Every time I blew a head gasket, cracked a piston, or blew a brand new turbo on a ford the lights went out? Forget the fact that it wouldn't start in the cold. The grid heater is a hair dryer type of element that draws more than a starter. The old algorithm was 3 cycles OR over 10mph and it stops.

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post #9 of 15 (permalink) Old 02-18-2019, 02:09 AM
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Watch the battery voltage readout while its doing this, if it is dropping from 14v to 11v or so its the grid heater cycling. It will cycle more then 3 times depending on outside air temp until you get going.

Assume you have the 180amp alternator? I believe its more noticeable on these setups.

I have my grid heater disconnected (getting removed when I have time) and it doesnt do these things anymore. Little rougher start when down in the teens and twenties but thats just for the first few seconds of operation.

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post #10 of 15 (permalink) Old 02-18-2019, 11:09 AM Thread Starter
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Why is this so hostile? If you own more than one brand of truck there are obviously going to be some things you like about one vs the other.

It’s definitely the grid heater. I was sitting in the truck, high idle on, and noticed the burp occurred when the lights dimmed.

This was a legit question I had.

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post #11 of 15 (permalink) Old 02-18-2019, 01:28 PM
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When you have nothing germane to contribute to a thread the next step is to make light of things. Most don't mean anything by it but it doesn't get your questions answered.

I'm a moderator on a audio forum and some days you wish folks would sit on their hands until the feeling to contribute their humor goes away. If it's a light hearted thread to begin with then no worries.

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post #12 of 15 (permalink) Old 02-18-2019, 02:43 PM Thread Starter
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Quote:
Originally Posted by Quint View Post
Watch the battery voltage readout while its doing this, if it is dropping from 14v to 11v or so its the grid heater cycling. It will cycle more then 3 times depending on outside air temp until you get going.

Assume you have the 180amp alternator? I believe its more noticeable on these setups.

I have my grid heater disconnected (getting removed when I have time) and it doesnt do these things anymore. Little rougher start when down in the teens and twenties but thats just for the first few seconds of operation.
My truck has a single 220A alternator. Since I live in NH and it’s winter, it seems like the heater will cycle on and off 10 times or more. I’ll leave it intact since it has already hit -15 or so once this season. Does unplugging it throw a code, I imagine? Would be nice to not have the lights dim at night in the summer.

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