Grinding noise In idle, sounds like coming from the lower timing chain cover, when I excelerate it goes away.I am receiving multiple misfire.the car is not stalling out.its on a 2002 kia sportage.replaced mass air flow sensor, throttle position sensor,new ignition coil, wires & plugs what else could it be?

sounds like like something is broken in the tapper cover? AmanStino Car Charger Quick Charger USB 3 0 3 Port with Smart Sense IC...

sounds like a dealer trick--sounds like timing chain is bad--dont turnit over no more u mite hurt valves--get away from that place and go to an honest independent to remove the cover and inspect chain--water pump and front seal are in same area-checkum out too

check your oil level as this sounds like hydrolic tap

Take a dry bar of soap and touch it against the sides of the belt(s) while the engine is running. If the noise goes away for a little while, the noise is from the belt settling into the grove of the pulley. Belts can really make loud pooping noises.

If this has no effect, then your timing chain may be too loose for the timing chain tensioner to compensate, and the chain is slapping against the inside of the timing chain cover.

If this is the case, do not let this condition go on. The timing chain cover is aluminum, and the chain is high grade steel. The chain will wear a hole in the cover if it is hitting the inside of it, and that is allowed to continue.

Check the ohm's reading on the fuel injectors, they should each read around 14-16 ohm's cold for most 1997 GM engines, and if any fuel injectors are not within range replace them.

it sounds like it needs a new coil pack but it could be the timing chain and tensioner

may be a camshaft chain problem your aj26 or aj27 engine is prone to broken chain tensioner/guide problems they are plastic you need to go to a speciaist jag/engine person . good luck

The rattling is a worn-out timing chain (rattling should be louder at one end of the engine). Get it changed now - they will eventually break, closely followed by your bank balance!

check your timing chain or belt might be loose and or your belt tensioner is not working

this is easy one if you put the a/c on do you hear the rattle if yes then shut off the a/c if the noise go away then it is the compressor