My 82 sliverado has a 350 and it has a miss and i dont know why

Question

by the left valve cover it has a clicking noise

Answer 1

Probably a bad plug wire shorting agianst the valve cover..

open the hood at night, and you probably would see a bright blue spark there....

Replace all the plug wires, and the cap and rotor while you're at it....

Answer 2

A lifter could have collapsed causing the clicking sound you hear. If the lifter is collapsed then the cylinder is not filling or vacating properly causing the miss.

Answer 3

check your spark plug wires for breaks in them, it sounds like you have one arcing, I would just buy a new set of wires and put them on.

Answer 4

could be a broken or bad wire,stuck rocker or lifter or bad plug.. i could go on but you're not giving alot of info on this one.  check in the dark when its running--if you see a spark, you've got a bad wire. no spark--try the plugs first since thats the cheapest fix.. if you're still having problems, try to get it to a shop that can scan you engine. it could be internal.. usually these problems are easy fixes.. if it has a buttload of miles on it, you could need a valve job but its smarter to redo the whole thing..   why put a new top end on an old bottom end.. not good.

Answer 5

Remove the valve cover from the side with the clicking noise.  Place a large piece of cardboard under the vehicle.  Start the engine. Observe all valve movement.  There should be a minimum of 3/8" movement on each.  If not then there may be worn cam lobes or a lifter issue.  

As for the misfiring could again be due the lifter, cam, or a valve.  A compression test will narrow it down.  If all seems OK, then check the ignition wires with a timing light.  NO misses or double flashes.  If there are, then replace the cap, rotor, plugs, & ignition wires.