It's probably the the fuel pump witch is located in the gas tank I'm the back of the van. If it's a quiet vibrating sound and it happens when the key is in the ignition, than that's what it is.
Describe the noise and the general area it is coming from and I would glad to answer the best way I can.
Timing chain noise is most commonly coming from a loose chain. The tensioner could be loose or broken or the chain could be stretched. If the chain slips or breaks before you fix it, then not only will the engine stop running but you could cause serious damage.
If the noise is a squeaking sound, it could be coming from the bearings in the blower fan. It could also be coming from a worn bushing or bearing in the blower motor.
Uhh well with what you have said it could be anything, you'de need more info on what kind of noise it is, and wheres it coming from.....
The noise you are hearing is the engine running. If you have not started it yet,then it may be an animal eating your hoses and wiring.
You'll have to isolate where the noise is coming from before you can do a diagnostic.
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
Noise coming from engine in Oldsmobile Cutlass could be as a result of an oil leak in the rear of your engine. This makes the gears to wear off leading to severe knocking noise.
Hard to tell without hearing it. With engine running, open the hood and try to determine the area where the noise is coming from then repost info.
the reason you here noise from your muffler are because less pressure from your engine is going fast.
Perhaps the cooling fan is running?
you have a small cat stuck under your car