Car engine noises

[Rubycon]

What is exactly making the noise when a motor strains?

Say you're driving up a steep hill at 25 m/h and you're in fourth gear and goose the gas. Instead of it moving it just sputters and sounds really bad like it's grinding beans!

I know switching to a lower gear is what you're SUPPOSED to do but I'm curious as to what makes that noise?

We went on a little trip in a not so safe vehicle in Belize and all of took turns at the wheel. :Q

It was a blast and we didn't kill ourselves but we probably ran over a few lizards.

 

[CraigRT]

sounds like detonation knock ...

either happens when a sensor is bummed, or bad/low octane gas is being burned .. (as far as I've had experience with)

 

[Christobevii3]

That is the motor not moving a fast enough speed to handle the increased fuel and air coming into the cylinders. When the mixture fires the piston barely moves and it is hard on the engine.

 

[Sukhoi]

Stop lugging your engine!

 

[MrPickins]

I've wondered that myself. My Ranger does that some, and it gets quite a bit worse when the A/C is on.

Ive tried higher octane, but no luck.

 

[beemercer]

Originally posted by: Sukhoi
Stop lugging your engine!

Downshift FTW.

 

[fbrdphreak]

Originally posted by: Christobevii3
That is the motor not moving a fast enough speed to handle the increased fuel and air coming into the cylinders. When the mixture fires the piston barely moves and it is hard on the engine.

Bingo

 

[Pepsi90919]

Originally posted by: MrPickins
I've wondered that myself. My Ranger does that some, and it gets quite a bit worse when the A/C is on.

Ive tried higher octane, but no luck.

problem found

 

[Rubycon]

Well yes it sounds like knocking if really bad but just a little strain and it makes a deeper noise.

A lot of noises were coming from that jeep and I'd say most of them bad. :laugh:

 

[BoomerD]

http://www.stanford.edu/~bmoses/knock.html

http://en.wikipedia.org/wiki/Engine_knocking

http://www.cartalk.com/content/columns/Archive/2005/August/07.html

http://content.hamptonroads.com/story.cfm?story=98031&ran=43046

 

[Rubycon]

I think this one was actually slapping pistons. :Q

It was literally making noises like you hear in the movies when the car leaves a trail of parts.

 

[MrPickins]

Originally posted by: Pepsi90919

Originally posted by: MrPickins
I've wondered that myself. My Ranger does that some, and it gets quite a bit worse when the A/C is on.

Ive tried higher octane, but no luck.

problem found

QFT

The 3.0 V6 is puny, and not efficient at all...
It's been reliable and I got a hell of a deal on it, though!