think i found cause of 2/3k rpm surging

[47silver]

do you think this would cause it?

[James Brown]

maybe but I doubt it . Was this cracked all this time?

[47silver]

The crack was hair line, i had the dizzy out and was checking the springs etec and when i went to put it back in I noticed a nick in the cap.
I pulled on it and it cracked in half.

I did replace the wires last year so i think it was ok then. I do not remember if i put a new cap on then or not.
i have a spare so i put it on tonight and started it,, no time to adjust the timing etc
the crack was hair line and the nick i noticed was at the rim of the cap...
i think it had to be arcing at times.

[T77911S]

surging??, definately a miss.

[Joe Bob]

The crack was ONE problem. The contacts look like a zit faced teenager working in a coal mine....

[47silver]

what would cause the contacts to look so bad? I replaced it about a year ago..

[Wil Ferch]

Cause for cap breakage?....possibly excessive force fitting the wires onto the cap?...and not knowing it at the time it was done?

[James Brown]

Howsit feel with a new cap? The greenish color on the cap is corrosion of the brass contacts. MSD ignition? looks like strong CDI ignition burning (normal wear).

[john walker's workshop]

i get them cracked right out of the box. always do an easy pull apart to check before using.

[stlrj]

Originally Posted by john walker's workshop

i get them cracked right out of the box. always do an easy pull apart to check before using.

JB Weld and it's as good as new!

[47silver]

put the spare cap, adjusted timing to 5 btdc with vacuum and the car runs great.

I am amazed that it ran at all with this cap.

I do have an msd ignition with a pertronix ignitor.

Had a bad msd in the summer.

[James Brown]

Yeah they are powerfull, just change out the cap often, there cheap.

[kwikt 911]

Looks like the contacts just need a little cleaning

[cudabnu]

Originally Posted by kwikt 911

Looks like the contacts just need a little cleaning

Easier to clean, you can do 3 contacts at a time!

[47silver]

I timed the engine to 5 atdc but did not try it at 6000 rpm for 35 atdc. For some reason that scares the heck out of me to run it to that without a load.

Is the 5 ATDC ok or should i time it at 6000

[prebordao]

You should do it at 6000 and don't be scared, that's really the way to do it.

[Superman]

JB Weld

[kwikt 911]

Originally Posted by prebordao

You should do it at 6000 and don't be scared, that's really the way to do it.

Agree. It truly is the correct way.

[47silver]

went to set timing at 6k,, did not get to 6k beforefull advance. I had 35 at aroun 3700

i am missing a distributor spring,, i think that may let the advance kick in at that rpm.

Is one spring something that was done intentionally? Will full advance at 3700 hurt the engine?

[kwikt 911]

It may start pinging.