4 3 Vortec Distributor Cap Problems

A spinning rotor at the head of the distributor contacts metal prongs on the cap of the distributor sequentially transferring the.

4 3 vortec distributor cap problems.

The distributor cap failing is a common problem across all vortec engines. It recommends taking out the wire screens located somewhere on the base of the distributor. 4 3l vortec distributor cap failure. The vortec distributor is responsible for providing the ignition coils with the electricity required to power the spark plugs and create combustion.

Ran cylinder compression test and fuel pressure test and everything checked out ok. The issue stems from failure of the housing that in turn allows the distributor shaft bushing to wear out. When you look at the spark plug wire terminals you ll see unusual wear patterns. Gm has a technical bulletin included in the new cap that speaks of a lack of ventilation which can cause pre mature corrosion of the cap.

Replaced the distributor cap with a new mercruiser cap and had same issue again 2nd time out. In addition you ll also see damage to the distributor rotor. The distributor in a 1997 chevrolet blazer accepts the electrical charge needed for combustion and relays it to the six spark plugs in the 4 3 liter vortec v 6 engine in a specific order. 4 3 distributor cap issues 08 22 06 06 05 am post 989299 in response to hdmk i had this exact same issue on a 96 and never found the actual cause of the problem.

I have a ski boat with a pcm 2003 gm 5 7 350 ci marine motor that uses the vortec distributor cap it is flat and the plug wires come off of the sides. I went through many caps both aluminum and brass inserts new wires new dist plugs coil but nothing fixed it. Started replacing all items one by one until we discovered the distributor cap was causing the problem. To verify vortec engine distributor problem set the code you simply remove the distributor cap.