My versa makes a knocking sound when i give it gas but not when idling. what is that noise?

you have to understand that with out information as to make ,model, year, what was done , mileage and any other details then it is impossible to give an answer.

SOUND'S LIKE YOU COULD HAVE A BAD ROD OR CRANK OR LIFTER.TRY THIS CHECK YOUR WATER AND OIL NOW START THE ENGINE IF IT IS A FAST KNOCKING HOLD YOUR FOOT ON THE BRAKE AND PUT THE CARE IN GEAR IF IT QUEITS YOU HAVE BAD ROD SERIOUS MOTOR REPAIR INTERNAL.DO THE SAME THING AGAIN AND IF IT IS MORE A THUMPING NOISE AND A SLOW DEEP KNOCK THEN WITH THE ENGINE IDLEING PUT IT IN GEAR HOLD THE BRAKE GIVE IT A LITTLE GAS AND IF THE MOTOR KNOCK'S GET'S QUEIT IT'S POSSIBLY THE CRANKSHAFT ANOTHER INTERNAL PROBLEM MOTOR OVERHAUL IF IT'S A FAST RATTLING IT'S PROBABLY A LIFTER STUCK OR BLEED DOWN DIRTY OIL OR A WEAK OIL PUMP ALL ARE BAD NEWS SORRY.GOOD LUCK

sounds like lower engine damage, could be a bearing or low oil pressure but if knocking the damage is done. i would have a tech just double check it to make sure, i have seen flywheels make noise and pulleys and a/c compressors, so just make sure it is in the oil pan if so then engine will need repair.

-No matter what type car. When it get older it's always has
this problem.
-Every thing worn out. (Too much clearance)


Mai Lor

Timing! Timing chain? Check both!

If this vehicle was driven without oil, the rattle or knock you hear is more than likely a damaged main bearing or rod bearing...sounds like its time for a QUALIFIED PROFESSIONAL to listen to your engine run and give you his opinion... Good Luck!!!

You need a trained technician to listen to this, but it sounds like a connecting rod and or a crankshaft main bearing noise. I lean more towards the rod knock form a worn out bearing.

this type of knock is caused by worn cranksahft main bearings

Possible. It's hard to give you an accurate cause, since I'm not able
to hear the sound. Most of the time, when you hear a slight wrapping
sound, it's a rod bearing,or crank bearing. When the rod bearing goes,
you'll know it,since it will knock like an SOB.

an injector could make it sound like an engine knock it s called a diesel knock