Need a Diagnopposis

"Bourbon&JellyBeans" (bourbonandjellybeans)
11/14/2016 at 16:18 • Filed to: None

Hey folks. I drove my 2014 Mustang on a 130 mile trip this morning. I was driving from Cumberland, MD back to Washington, DC. The car twice made a sound that I’ve never heard it make before. The first time it happened was when I booted it from 60mph to 80mph. As soon as I gave it the throttle, a weird...I don’t know...crunchy sound...or maybe explodey sound came from the engine bay. I was all like...whoa wtf was that? But the car continued to run fine for another 90 miles. Then I did basically the same thing and again, a quick crunch/boom sound from the engine as I fed the throttle. My first thought was a backfire because it sounded like a boom from the front which could have been a detonation in the intake (though I’m really far from an expert on this). I also considered that it could have been the gears grinding, but wouldn’t I have felt that too? Like a jolt through the drivetrain? Cause I didn’t feel anything at all, just the sound as the car shifted into a lower gear to accelerate. Anyone know what that could be? I did get gas from a sketchy station before I made the trip, so maybe bad gas was just screwing with something causing backfires?

Have this ad for your time:

DISCUSSION (11)

Bourbon&JellyBeans > Bourbon&JellyBeans
11/14/2016 at 16:19

Also, since those two occurrences, no idiot lights, fluid levels ok, driving normally, etc.

Party-vi > Bourbon&JellyBeans
11/14/2016 at 16:23

I have nothing useful to add to this except did you visit Cafe Mark? Because that place is wonderful.

Roadster Man > Bourbon&JellyBeans
11/14/2016 at 16:43

Blinker fluid.

That’ll be $75.

Textured Soy Protein > Bourbon&JellyBeans
11/14/2016 at 17:00

Some engines are more sensitive to octane than other. Could be if you had some slightly sketchy gas that set off the knock sensor and caused the ECU to pull timing. Even if you don’t have a CEL you may have some pending codes stored. I’d scan for pending codes and see what comes up.

Rusty Vandura - www.tinyurl.com/keepoppo > Bourbon&JellyBeans
11/14/2016 at 17:12

I had a Mustang II with a 302 that probably made at least 100 horsepower.

Bourbon&JellyBeans > Party-vi
11/14/2016 at 18:15

No! I went to the Rocky Gap Casino Resort.

Bourbon&JellyBeans > Textured Soy Protein
11/14/2016 at 18:16

Hmm, okay will do. That gas is pretty much all gone so we’ll see if it continues.

Party-vi > Bourbon&JellyBeans
11/15/2016 at 08:15

Nice.

RacinBob > Bourbon&JellyBeans
11/27/2016 at 17:15

Are all the under engine panels intact? Sometimes I see cars with them flapping in the wind and I think that they must be making a really interesting noise.

Bourbon&JellyBeans > RacinBob
11/27/2016 at 18:26

Yep, tight and secure. I think it was the gas. Since this post, the noise hasn’t come back!

Rusty Vandura - www.tinyurl.com/keepoppo > Bourbon&JellyBeans
11/29/2016 at 19:44

I owned one exactly like the yellow one in the ad. It had a V8 with at least 100 horsepower. Maybe 105.