Hi there. Check the positive crankcase ventilation valve (PCV) and see if it's plugged up. Also, check the engine oil and make sure that there is the proper amount of oil in the engine. Too much oil or a sticking...
There are only two things that can cause this problem in this engine. One is the distributor timing jumping up and down due to worn out components inside the distributor. The other problem may be that the carburetor is not...
Hey there. The starting system has to turn the engine over at a certain minimum rate (RPM) in order for the engine to catch and run. If there is no voltage drop between a new fully charged battery and the...
Hi there, thanks for writing in. The shift linkage should first be checked to make sure it is going all the way in gear. Sometimes these vehicles had problems when motor mounts broke and it would not go into gear....
Hello. A buzzing noise that goes up and down with engine RPM is usually caused by an issue with the alternator. It is either caused by it being shorted internally, it being loosely connected, or a bad ground connection to...
If you are running a 13:1 compression in an engine then you will have to have high octane fuel. The first thing to do you should do is to check all the plugs to see if one is fouling out,...
Hello. If you have leaks, it is best to determine what fluids are leaking. Engine coolant usually has a green or orange color, depending on the type of coolant used. It is usually sweet-smelling, if it is relatively clean. Engine...
Hi there. The vacuum hose to the valve cover is not to be under engine vacuum but rather under throttle vacuum. The lines on the valve cover are for ventilation only from leaking combustion gasses. The brakes will work very...
Hey there. Worn piston rings create more crankcase fumes (i.e. the smoke you see coming out of breather tubes and orifices). This is called "blow-by". As long as the PCV valve stays clear, and the engine can handle the fume/clean...
Hello. You need to see if you have power to one side of the coil and blinking power on the other side when you crank the engine. If you do and no spark comes out of the coil, then replace...
Hi there. It sounds like the transmission forward clutch plates are slipping. First check the fluid level and fluid condition (https://www.yourmechanic.com/services/transmission-fluid-service) by putting the dipstick fluid on a clean white towel and seeing if you see what looks like sand...
That baby was made for high-test gas. So, you have to buy the best gas you can find. I say use the Shell V-power if you live in the United States. That seems to be the best gasoline for those...
It can always be a challenge when addressing an issue with a classic car, such as with your 68’ Chevelle. Provided that your Chevy has not been modified, your problem may simply be found in the spark plugs. Each spark...
Hi. On older vehicles such as yours brakes are crucial due to the mass of the car. Drum brakes are known to last longer than disc brakes but do not hold the same stopping power and cooling ability. Wheel cycling...
