Car Knocks When Shuting off


Asked by Jan 27, 2014 at 08:02 PM about the 1984 Chevrolet Caprice Classic

Question type: Maintenance & Repair

Car Knocks When After I Turn Car Off
Sometimes Car Keeps runnin

13 Answers


Idle is set too high or timing is set too high.


HOw Do I Adjust Carb Choke DifficulttTo Warm Up In Cold That CoulD B problem


Try Premium gas. It has a higher flash point and won't ignite as easily, therefore preventing "dieseling"


Pull the breather off and adjust the screw on the linkage where the cables are.

James Ramond

decarbonize the engine, you must seldom run high highway speeds

Jason Zane

when it does that i put it into gear shut of the engine and then go to park. i heard it could be bad to let it run-on. also run it on the highway to clean up the carbon deposits..


it could have bad gas

John Carson

It is your timing. Also put some STP or equivalent engine cleaner in the gas tank to clear some of the gasoline gunk built up. If you are only going on short in town driving, put the additive in the tank and use that as an excuse for a long drive to see some sights and have a lunch out.


Could B Timin Have Been Sitting For A while. Also Leaks Transmission Fluid Between Engine And Transmission, Trans Slipping Around 35 mph


SOmetimes Shift SMooth. Den Other Times It Takes High Rpm To chanGe Gears OnlY Second Though.

John Carson

Your also leaking transmission fluid that is why the leak and strange shifting. Have it looked at.


Was Told I Had Need Front Seal Makn Surr That I Didnt Need A New Transmission

John Carson

They may pull you transmission to work on it, replacing the seal, but it should fix your problems. If you want to spend more money you can have them go through the transmission. You should not need a new transmission. If you were leaking fluid it caused the ill-regular shifting due to lack of sufficient tyranny fluid.

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