what causes ur car to sound like a rod is knocking and ho...

Hello and thank you for using JustAnswer. My name is \*\*\*\*\* \*\*\*\*\* I will do my best to assist you. During this conversation you will be given an automated offer for a phone call. You may accept or decline that offer.I don’t personally offer this service so if you take this another tech may call I’m sorry that you’re having trouble with your vehicle. I will do my best to help you resolve them. Please understand that I do not know your knowledge or capabilities so I may need to ask questions to find out basic information to help solve your specific problem. My aim is to give you the best service possible and to help you. If you have any questions or concerns, please don’t hesitate to let me know. Sometimes it may take a moment for me to respond because I may have to look up information about your concern. I appreciate your patience and will provide responses as soon as possible. A deep knock can be from a broken piston wrist pin, slung rod bearing, slung crankshaft bearing, rod cap studs sheared off throwing the rod. The only way to know is a teardown. You start by removing the oil pan and inspecting the bearings and rod caps and if nothing conclusive found, you remove the cylinder heads and pull the pistons Thanks for using Just Answer and letting me help you. I hope I provided what you needed. If you find more help is still needed, let me know by listing out any remaining questions you have on this concern. I hope the remainder of your day is well.

can a timing chain make it sound like a rod is knocking

HI No, it will make a loud rattling noise, but not a knocking noise.

when its idling it rattles but when u give it gas it knocks'

HI, what other symptoms have you left out since you failed to mention the rattling. I am trying to diagnose your vehicle online without benefit of the vehicle in front of me. If you want an accurate diagnosis, then you have to list ALL symptoms, not just 1 of the symptoms.

ok i was driving it and it lost power and started overheating then it died out on me then when i tried to start it it just dragged waited for an hour then it started up it was missing real bad and wouldn't stay idling then when u give it steady gas i hear knocking

HI Ok, that points to headgasket letting go and most likely washing out the oil from the bearings and one or more rod or main bearings were slung.

alright thanks

you are welcome

One more thing what will make ur car not idle only way for it to run is by giving it gas

HI because the engine has poor compression at this point

Alright thanks

you are welcome