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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
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Can you think of what else to unplug before welding?
DME, DME relay, wires to coil, three sensors.
How 'bout the plug(s) at the rear relay board? Where is the speedo pick up? |
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Join Date: May 2005
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Milt, our rule is anything that pertains to charging system and ignition. So Battery (at least the ground), alternator, coil, distributor, dme, etc.
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75 911 Indian Red- RUFWAN2B 2000 Boxster 2000 & 2007 Dobies www.stahlwerks.com Cages and preparation for your Porsche “People who never make mistakes must get tired of doing nothing” Bill : The origin of the orgy of Porsche |
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OK, I didn't forget the battery here, just on my post.
Any way to disconnect the alt externally? On second thought, I'm welding on the muffler. I think I'll remove the muffler instead. |
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...waiting for the PB Blaster to do its magic.
Anyway, this stuff is good to know. This ol' '88 is a lot more complicated electrically and electronically than my '71. ![]() |
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Milt,
Factory alarm module is famous for dying at the paint & body shop, and rendering the car un-startable!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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Quote:
Gonna take a ride tomorrow!. Thanks, Warren. |
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Dog-faced pony soldier
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Yet another convincing argument to go with carburetors.
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A car, a 911, a motorbike and a few surfboards Black Cars Matter |
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Not really. You still have the 14 pin connector, the dizzy (especially the tach lead on early cars), the battery, the CDI and maybe some more. All these cars are different.
But the later ones can get harmed easily, IMO |
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Crotchety Old Bastard
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Wouldn't proper grounding take care of any non-computer issues?
I've been welding on my car for years with no problems.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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I've done quite a bit of welding on my '85 and other than disconnecting my battery I've done nothing special. Never had a problem as a result. Luck perhaps?
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Warren & Ron, may you rest in Peace. |
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Location: Davidson NC
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I have welded on lots of cars - call me crazy - but never unplugged anything and never a problem. I just put the ground clamp directly on the part I was welding which was almost always something on the exhaust system. Some of those cars had some very sophisticated electronics.
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I have taken my cars to exhaust shop many times. As BertBeagle said, they never unplug anything even when I requested to unplug the batery neg cable.
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Fat butt 911, 1987 |
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Well, I guess there are two sides to a story. But, if something goes wrong, or you touch something you shouldn't in the darkness of the helmet, then it could be a problem. Someone recently blew their CDI (actually an MSD unit) by just touching and grounding the battery cable at the starter.
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It's always good to be extra careful isn't it.
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Fat butt 911, 1987 |
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Quote:
Sherwood |
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