The brand of fuel you are using may cause it. I had started using UNOCAL super for awhile in my Buick Regal/86 and it went away. It had started when the blend in my preferred fuel was modified for the season change. Go up a grade of fuel or change station brands for awhile. /Alex
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.
Power Steering?
can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?
you may have a rod knocking and you need to take it to a shop asap
Typically, a knocking noise when to use your brakes in the car is caused by your brakes wearing down. This means you need to get them checked out and repaired.
A single knocking noise when braking or turning can be caused by a faulty axle. The cost of replacement is usually around 1,000 dollars.
Running too lean.
Normally caused by worn steering or suspension components.
Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. The engine having a coolant leak or an engine timing problem could also cause the knocking noise.
I would check the suspension bushings, if one of them is worn it would cause a knocking noise.
You probably need your bearings repacked
The thing that could cause a knocking noise in your car is the same thing that could cause it in all cars A rod that or a flat lifter. it all really depends on where the knock is if its higher and to the back of the motor, it could be a motor mount