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Sounds like a Belt or timing chain is slapping inside the Cover ,,, usually a sign that your Belt or chain tensioner is broken ,,, i wouldn't run it to long ,,as it will skip and do serious engine damage ,,GET IT TOWED TO A TRUSTED SHOP !!!
Not enough info. Does it do it idling? speeding? From your info, it could be a loose timing chain slapping against it's cover .Is there any way to pinpoint the noise? Or if it's loud enough, video tape it and post it.
could be anything from belt noise idle pulley noise to lifters or injector noise is it a knocking noise is your check engine lite on I think I would have a mechanic look at this issue before it becomes a breakdown
Timing chains stretch with age and when they do they start "slapping" timing case. If your extended warranty people were intelligent they would cover the replacement instead of waiting till it explodes and destroys a ton of other parts.
For some reason the engine is loosing oil pressure, the engine will shut off when the oil pressure sensor reads no pressure. The knocking noise could be the timing chain slapping against the sides of the covers as the tensioner is operated by oil pressure or a bearing problem. First check to see if there is the proper amount of oil in the engine, if so, I would recomend you have it towed to a Qualified Repair Shop that can determine the problem [ they can also document the problem in case you have cause to go back on the place the did the oil change ].
The timing chain keeps the major componants in the engine alligned. A new chain will allign the engine componants better than an old chain that is sagging... and will thusly make the engine perform better and get better fuel milage as well as last longer.
I would replace the chain and not even consider the tightening of a chain that is that worn out...
You are lucky not to have the chain skip and cause the valves to come into contact with the pistons... ( read ; Interference engine)
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.
Which engine is this VE30DE or VG30. You can tell by looking at the valve covers. (but by what you are descibing you have the VE30DE) If the valve covers are red in color, than it's a VG30 with a timing belt. If the valve covers are BIG aluminium ones , than that's a VE30DE engine with timing chains. Or if your speed goes to125MPH than its a VG30 , but if it goes to 145MPH than its the VE30DE (24 valve dual overhead cam with variable timing control) Let me know what you have and we will take it from there.