4 3 Vortec Distributor Cap Problems

I went through many caps both aluminum and brass inserts new wires new dist plugs coil but nothing fixed it.

4 3 vortec distributor cap problems.

The last cap only lasted 3k before it started mifiring. In addition you ll also see damage to the distributor rotor. Replaced the distributor cap with a new mercruiser cap and had same issue again 2nd time out. It recommends taking out the wire screens located somewhere on the base of the distributor.

The distributor cap failing is a common problem across all vortec engines. 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. 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. Started replacing all items one by one until we discovered the distributor cap was causing the problem.

A spinning rotor at the head of the distributor contacts metal prongs on the cap of the distributor sequentially transferring the. To verify vortec engine distributor problem set the code you simply remove the distributor cap. I have a 3rd cap now with the same problems. The issue stems from failure of the housing that in turn allows the distributor shaft bushing to wear out.

I only get. 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. The vortec distributor is responsible for providing the ignition coils with the electricity required to power the spark plugs and create combustion. 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.