answersLogoWhite

0


Best Answer

This could be a cracked flex plate (common on this vehicle).Also common if it is a k1500 the centering main bearingon the 350 vortex goes bad due to the oil filter being sideways on the motor.If you put sea30 motor oil on your next oil change and it goes away it's your bearing.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: 1994 Chevy 1500 with a 350 engine you are hearing a knocking or slapping noise coming from the back end of the engine but only when you accelerate or its under a load any clues what it could be?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Loud knocking banging noise on 350 Chevrolet that comes and goes still drives when making noise but everytime accelerate it starts banging. noise is coming from the motor really hard banging.?

With out hearing it, It is hard to say whats wrong. But the most common noise like that would probley be a ROD knocking. Time for engine overhaul.


What would cause a knocking noise to get faster as you accelerate?

It's according to where the noise is coming from if it's the rods knocking due to low oil it will get faster because they move up and down and move faster when the motor gets faster.


What causes a knocking sound in your car?

many many things, Loose lug nuts which lets wheel make knocking noise. Engine will make a knocking noise if it is really low on oil. Some timing belts make a knocking, slapping noise just before they break.These are just a few examples . Have someone ride in car with you as you duplcate the noise and see if they can determine which part of the vehicle it is coming from.


How do you know if valves bad on Chevy Camaro?

if youre getting alot of white smoke from your tailpipe and if you hear a knocking noise coming from the top end of the motor could either be a rocker arm or a valve if it is knocking and the valve is bad the knocking will speed up as you accelerate valve are cheap and easy to replace anymore questions email me at utcbass_man@yahoo.com


1999 Chevy blazer there is a knocking coming from the engine when it is in idle and when you accelerate the knocking gets louder and faster. What could cause this to happen?

My 99 sonoma had a knock and it was a wrist pin in the engine, my 99 jimmy fuel injection leaked gas in the engine oil and caused the main bearings to fail because of lack of proper lubrication.


How to stop the fuel injector knocking noise on a 1996 Toyota tacoma?

I get knocking & ping noise coming from the fuel injectors


What is a evidenciary hearing?

It is hearing that doesn't seem to be coming through the ears.


Why isn't kaarthika coming on Disney channel?

coz... director sammy...banned it for slapping heroine. by, sowbarnika


What would cause wistling noise coming from the supercharger on your 2002 grand prix?

If you're new to a supercharged car then you're most likely hearing the normal whine that a supercharger makes. They will whine louder the more you accelerate. 00gtp


What is a non evidenciary hearing?

It is hearing that doesn't seem to be coming through the ears.


What is a non-evidenciary hearing?

It is hearing that doesn't seem to be coming through the ears.


3.1 motor has loud knocking?

if it sounds like the knocking is coming from the bottom of the engine i would bet it was the rods or rod bearings may be worn. if the knocking is on the top ,then i would have the lifters and or the rocker arms checked.