Car makes loud knocking sound at high speeds?
A loud knocking noise in the motor of a car at high speeds is most likely the engine. There could be another issue with the transmission if the knocking only happens at high speeds.
What would cause a loud knocking noise coming from the engine at 70 mph and make the truck shake very badly?
is the sound speed dependent.do you hear it start and go away at certain speeds say its there from 25-45 mph?if it is a high pitched rotational noise it is either the brakes are worn and squealing or the front hub or hubs are making the noise.this is fairly common.the inner seal of the hub gets worn and dry and makes the squeak.hub needs replacement not serviceable
The variable intake controls the amount of air pushed through the engine in order to keep it from stalling. The laws of physics that describe Air flow at speeds below Mach 1 (speed of sound) are different for air flow at supersonic speeds. So the size and shape of the engine inlet at low speeds are different that at high speeds.
Why does your 93' dodge spirit run fine until you hit 45 mph then it revs real load and wont go any faster?
There is probably too much clearance between the rods and the crankshaft causing the motor to knock. If this is the case you need an overhaul job on the engine. The clicking sound is probably cause from using too low octane gas or your firing is set a little too high. http://www.autozone.com/servlet/UiBroker?UseCase=S001&UserAction=viewSimpleDiagInfo&Parameters=info answer knocking sound comes from worn bearings and parts in lower engine ticking comes from tappets, or more specifically the hydraulic lifters in…