Engine rattles at acceleration and hesitates

My car sounds very loud when accelerating? ' Yahoo Answers

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Dec 8, 2007 - My 2000 Honda Civic LX has always been very quiet, but during the ... be warn raw but that usually makes a squeak, but it sounds more like ...

Why is my car making a rattling noise when I accelerate? ' Yahoo ...

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Nov 29, 2012 - Whenever I accelerate the car makes this rattling noise - it sounds like its coming ... When I stop accelerating (or only just slightly have my foot on the ... Try speeding up more gradually -- pretend there's a raw egg between ...

What Is Engine Pinging? - RepairPal

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"Pinging" is the metallic rattling sound an engine can make when accelerating. ...environment in the form of nitrogen oxide (NOx) and raw, unburned hydrocarbons (HCs).... Daniel Dillon has twenty-two years of experience as a licensed Smog ...

You need to find where the noise is coming from. On the top could be lifters, valves or low octane gas causing a ping. On the bottom could only one thing. Rod knock. The bearings for the pistons and crankshaft are worn.

dear . it seam like had leakage air from turbo pipe or air cooler
at turbo line .

"Rattling" is normally due to one of two things:

1. On heavy acceleration, rattling is usually due to low octane fuel.
2. If at all times, it can be due to low oil pressure.
   
   Rattling can also occur if the engine timing is way out specs. This will normally be accompanied by a substantial loss of power on acceleration.

Here's the crux of the problem, something is plugged up somewhere and is keeping your catalyst from performing properly. I suspect that the exhaust manifold may be leaking big time and because it is, the pressure flow to the cat isn't what it should be. It's possible that a piece has been blown out of the head gasket and your engine is performing poorly. In fact, I would suggest that you run this down as it seems the most likely cause.

Because your car is hesitating and rattling when you are accelerating I suspect that the engine's pressure levels are all over the place due to the head gasket.

If you have the tools available, you can check it out yourself, but given the complexity of the Amanti's engine, I would suggest leaving it to a trained technician.

possible loose heat shield cover on exhaust pipe and bad oxygen sensor

try looking at motor mounts.

First thing i would try...... ISOHEET, Red bottle..... allows water to be mixed into the fuel and be burnt out of the tank.
get a good qaulity fuel injection cleaner, if you can locate the brand MALCO, i found it quite succesful..... and go with a full tank of premium fuel such as ammoco or shell......do not use yellow bottle of heet

I would have to hear it. may be the engine mounts.

sounds like timeing is out or you need higher octane gas