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What could be the cause of a rattling noise but engine never shuts off. No Mil. Alerts or any stuttering. just loss of power and loud knocking noise the more you rev it?

Knocking Sound Loss of power No mill alerts or any stuttering while in drive. Engines stays on but hardly goes. has oil and coolant didnt overheat. Trani fluid was good

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I have had personal experience of a head gasket blow the dodgy mechanic who re-built my motor at the time did not clean the head bolts and so they were not tensioned properly (I digress). Anyhow it blew between two cylinders - man what a racket! I thought my engine was kaput. In short my answer is head gasket - could also be a burnt out valve but most likely something in your top end of the motor.

Posted on Jan 18, 2013

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My 2004 Pontiac sunfire engine is making a knocking noise what could it be


Internal damage to the engine. Usually a knocking is a loose piston rod that connects to the crankshaft. When the rod bearing gets too worn, it causes the rod to become loose around the crankshaft, and you get that horrible knocking noise or rattle. The engine has to be rebuilt (very expensive) or a replacement engine must be found.
If the knocking is loud, and not a ticking (valves or valve lifters), then it won't be long before the engine is destroyed. Too much pressure on the loose rod-soon it may come apart and blow a hole in your block from the rod disintegrating. Not a pretty sight!

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Audi a4 b6. car has a bad pinging noise. what are the fixes


The most common cause of this is a tank full of old fuel or bad fuel. I have seen both even hear in the USA.

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Knocking rattling noise from engine appeared while driving loss lil power running but loud knocking in engine


You didnt state vehicle however if the engine knocks the knock sensor will back off the timing thinking its detination not an actual knock if its knocking loudly stop driving it, something is going to let loose

Oct 06, 2015 | Cars & Trucks

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Loss of power and engine making rattling noise


Run fault codes and look for failed knock sensors. I would suggest that the rattling noise is detonation from a lean fuel mixture-ignition timing or faulty EGR system. Detonation is when the fuel ignites with out the use of spark and occurs early as the piston is coming up so the piston is slammed against the cylinder walls. Prolonged detonation will cause melted holes in the pistons tops and broken rings so I would advise you fix this problem as soon as possible.

Sep 01, 2013 | GMC Cars & Trucks

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2002 BLAZER WHEN STARTING VEHICLE OIL PRESSURE GAUGE READS HIGH, KNOCKING COMING FROM ENGINE, WHEN ACCELERATING IT GETS FASTER & FEELS LIKE LOOSING POWER WHEN DECELERATING


Bang on the catalytic converter being careful not to get burnt and see if it's loose causing a rattle. Until you determind what the problem is don't drive the vehicle. The other possibility is that you may need an engine. If what you're hearing us a connecting rid knock.

Jun 06, 2012 | 2002 Chevrolet Blazer

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1995 Ford Windstar Engine Knocking at startup. Driven 2800 miles since last oil/filter change. Oil level SAT, Coolant level SAT and no visible leakage. Engine completely rebuilt 2 years ago. Engine has...


No if the oil light has flickered you have oil pressure loss some time just belive the sensor do help us out. lifter do not cause oil pressure loss pressure is built in the rotation of the crankshaft. The knock under the plenum will point you to that cylinder that is affected, (main bearing) as for a 1995 the injectors can only cause a misfire but no knocking noise,will they honor the warranty

Apr 21, 2011 | 1995 Ford Windstar

3 Answers

Loud knocking coming from the bottom end and now loss of power sludge build up i have changed oil normal every 2500-3000 miles with synthetic and slick fifty.


the engine probably has a bad bearing in it.oil sludge can be caused by short trip driving,overheating,pluged crank case vent or pcv system not working.the power loss due to the computer retarding ignition timeing due to the knock sensor producing a signal from the engine knock.regardless an ongine ocerhaul or replacement is neede.
but first make sure that the bell housing bolts,torque converter bolts are all tight.
make sure the knock isnt from the catalytic converter
check for dents in the oil pan
check engine accessorys for noise such as water pump.power steering pump,alternator,a/c compressor.and all attachment bolts

Apr 04, 2010 | 2000 Dodge Durango

1 Answer

Loud ticking noise


Ticking is generally associated with a valvetrain problem but may be caused by low oil level or pressure. Noise is in the upper half of the engine. Knocking is from low oil pressure and is caused by worn bearings causing pressure loss. Knocking is the worse of both conditions (means overhaul or engine replacement.) Ticking needs to be checked for it's cause...if cause is low oil pressure, remember...oil pumps don't cause low oil pressure, pressure will lost if bearings are worn or pump inlet screen is plugged with carbon.

Jul 18, 2009 | 1999 Jeep Cherokee

1 Answer

Flashing oil light/ loss of power


Check your converter on your exhaust when it's running and see if the noise of rattling is coming from there.If it is you have a plugged converter,it's broken up and in piece's which will make noise and no power especially when calling for power.Be sure to let exhaust cool before repair is done.If the engine is making the noise like a knocking sound you should bring it to have it checked.Hope this help's.

Jan 24, 2009 | 1997 Pontiac Sunfire

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