Cleaning electrical connections

[Davz912/911]

So the last couple times I've driven my car its been spitting and sputtering, tach would jump
around during these "episodes" and gauges would fluctuate. I new I was having voltage issues.
So last night I spent a couple hours cleaning electrical connections, starting at the battery and working
my way back to the engine compartment. Found dirty grounds, loose fuse screw downs etc.
Car runs MUCH better now. My question to you all...how often do you go in and clean your connections?
I also found my battery ground stud is in bad shape, I only have about five threads left at the end of the stud.
are these replaceable? or are they part of the body?

[304065]

The ground stud is brazed onto the chassis at the Factory.

[SIMI BOB]

Heard once that dipping the spade connectors in a mixture of vinegar and salt would clean them up, but haven't tried it. Anyone heard of this?
Bob B

[37yrold911]

I use Ye Olde Warren Hall method - diluted photography acetic acid - forget the ratio but not too important - stronger than vinegar from the grocery but not too dangerous

then wash and spray with Caig's DeOxit

for on the car studs, I soak a cotton ball or paper towel and put plastic wrap over it with a string to hold it overnight - if green the next day, repeat

a brass brush works well to help also

dunno re salt...

[Boulder Bob]

where are the major grounds to clean, other than at the batteries? what specific grounds might cause the tach to bounce?

thanks

[37yrold911]

Porsche's engineers took care to locate the grounds in very hard to find, out of the way places.

From the LH side of the trunk, bend over the gas flap with a good flashlight and look into the dank inner recesses under the gauges, way up behind the fuel filler, towards the LH corner. Use your magic staff to blow away the fairy dust collected there and you may be able to discern, as if through a glass darkly, a ground stud.

[RSTarga]

Usually a bouncing tach is either bad points or the spade connector at the distributor.
After cleaning grounds use a little vaseline on them to keep water off, after spraying with WD40.

[Fritz A. Ficke]

I like this source http://www.goodspeedmotoring.com/ele...ardware-tools/ for copper ends design for a 'W' crimp and the additional insulation crimp just like the original German stuff.

[37yrold911]

don't those require a special crimper tool? (i.e. not something at the local hardware store?)

[Fritz A. Ficke]

don't those require a special crimper tool? (i.e. not something at the local hardware store?)

Yes, that co. also sells the tool, not cheap but really nice.