The end play caused the distributor shaft to thrust upwards when decelerating and push the rotor into the cap.
Vortec distributor cap problems.
The symptoms are a p0300 code misfiring backfiring poor starting no start rough running etc.
Wondering if i need to go to original acdelco distributor.
I had a problem of the distributor cap on my 98 5 7 and it was because the cap wasn t sealed good enough.
It also caused the hall effect sensor to misread the notch in the rotor.
Gm used the style cap on v6 and v8 vortec motors.
This causes the rotor bushing to wear out and the distributor begins to no longer be able to turn.
The issue stems from failure of the housing that in turn allows the distributor shaft bushing to wear out.
It doesnt help that the ac line from back of compressor runs right over the top of distributor.
You need a throx t 20 to pop the cap and t 15 to take off the rotor.
I had the truck for about 4.
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.
When you look at the spark plug wire terminals you ll see unusual wear patterns.
1 the air gap between the rotor and cap electrodes is greater on the 5 7 vortec engine causing the rotor to prematurely burn.
The underlying problem is that its a design flaw.
Any kind of moisture will make it hard to start or not start at all.
And the distributor sits in a high heat part of the engine with poor air circulation or cooling.
You might hear a tapping clicking or sputtering sound when the distributor rotor and cap are failing.
The last cap only lasted 3k before it started mifiring.
I went through many caps both aluminum and brass inserts new wires new dist plugs coil but nothing fixed it.
Make sure to get a quality cap though.
In vortec engines the problem stems with the cap on the distributor not the actual distributor itself.
I have changed icm coil back to acdelco plugs.
All that condensate dripping straight down into cap.
2 could their be a defect in the distributor itself that wont allow the moisture to leave causing the corrosion.
It doesn t have any vents it has to be sealed to stop moisture from getting in there.
The cap is prone to warping from the heat which results in the cap rubbing against the distributor rotor button.
97 chevy k1500 5 7 vortec is burning distributor cap and rotor about every month 5 answers.
I have a 97 truck v6 vortec and every year i have to buy a new distributor cap.
Moisture water whatever you want to call it gets in it and screws it up.
Every month or two i am burning up distributor cap and rotor.
Heck i was parked idling in the rain the other day and somehow rain got sucked up in it started missing warning light blinking i was parked.
To verify vortec engine distributor problem set the code you simply remove the distributor cap.
