GEN 2 Engine backfiring?

• May 27, 2017

• #1

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MKomertz

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So I just fueled up, I've been putting in 89 octane. And on my way home maybe less than 3 minutes, I pull up to a stop sign and I heat two POPs, and didn't think anything of it. I come to another stop sign and hear another POP. Is this sound the engine backfiring? Any reason it would do this? Anyone else have or hear about this issue?


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• May 27, 2017

• #2

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pjones

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This may be due to the evap system. Does it go away after a few miles? Only happens after you fuel up?

 

• May 27, 2017

• #3

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Muredhawk

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Happens every time...

It's really loud with my borla exhaust...

 

• May 27, 2017

• #4

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MKomertz

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Ok' yeah it was only a short period of time. No issues since.


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• May 27, 2017

• #5

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df4801

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Not normal. Haven't had a single backfire yet.

 

• May 28, 2017

• #6

AvoidTheBoyd

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Happened to me only one time, a couple of pops a few thousand miles ago. I was messing around with baha mode and was running 87 octane. I've been running 89 or higher since and hasn't repeated. I can only assume that was it.

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• May 28, 2017

• #7

tightt

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MKomertz said:

So I just fueled up, I've been putting in 89 octane. And on my way home maybe less than 3 minutes, I pull up to a stop sign and I heat two POPs, and didn't think anything of it. I come to another stop sign and hear another POP. Is this sound the engine backfiring? Any reason it would do this? Anyone else have or hear about this issue?


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Click to expand...

Any other mods on the truck?

 

• May 28, 2017

• #8

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MKomertz

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tightt said:

Any other mods on the truck?

Click to expand...

No,none


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• May 29, 2017

• #9

CatchMeOffroad

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Mine did the exact same thing a few days ago!! 5.5k miles on the truck, and never heard it before. Installed a CORSA Xtreme catback exhaust system recently so when it backfired it was very loud. I was on a road trip so I filled up a few times, and it did the backfire thing every time I filled up.

First time it happened, I thought it was the car behind me. Second time it was super loud, and I stopped immediately to see what fell off my truck

 

• May 29, 2017

• #10

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psufan

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Not sure what's specifically happening on your truck; however, if the pops are occurring when you lift throttle during acceleration (i.e. lifting to coast to a stop), it's probably unburnt fuel burning (exploding) in your hot turbine/exhaust track. This is especially noticeable if you are running an aftermarket exhaust (or are catless). Both my Corvette (stock powertrain) and my Evo X (not stock / catless) do this. Most vehicles do this, but it's often well muffled by the cats and stock exhaust.

Note, I would assume that this might be more prevalent with lower octane gas due to it's lower resistance to ignition. That being said, I haven't driven a vehicle that hasn't required premium in like 15 years... so no first hand experience with that.