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Join Date: Jul 2008
Location: Central Washington State
Posts: 4,403
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Dead in the H2o, and 2" to save your ass
Most of you kids understand the basic electrical gremlins we experience every now and then. but some of you are still picking up knowledge in that regard.
Here's one that we should all know in our sleep: I was fixing for a fine ride, maybe 50 miles round trip this afternoon. Got all of 5 miles away from home into a little resort/lake town with a high Ukranian/Russian populace. As I entered the city limits, low and behold she quite running. Sheeeeiiiittt I said, as well as other F type words. The fuel pumps no workie. Did the requisite stuff: Checked the fuel pump fuse (was good to go), pulled off/beat on and re-inserted the yellow relay from hell....all seemed good...more on that later). The freakin' bitcsch would not allow the fuel pumps to run. I'm thiking "crap, leave my car here in Mafia-land, come back with a tow truck to no car". NOT an option. Pulled off the cover to the yellow relay, 'cause I was smelling electrical hot chit somewhere. Behold, one nasty shorted out burned area within the relay. So what to do? I knew exactly what was needed, but what I really needed was a short piece of wire to bridge 87A and 30 of the relay contacts. Did I have any emergency wire handy....FFuuucck no. So I pulled off and straightened out the pull tab from a beer can that I was planning on enjoying later, and used it to bridge the gap between 87A and 30 of the yellow relay socket. The pumps fired up, but the piece of aluminum was too short. Meanwhile, the low life insurgents are starting to gather around, drooling about what might become their fortune. Me, I'm wracking my brain, need a simple piece of damn wire. Rooting around in the glove box, I came across a spare fuse which - when disassembled - was long enough to bridge the gap between 87A and 30 of the yellow relay socket. VVRROOMM....off we went. Note to self, and note you you all: Keep a 2" piece of wire in your glove box, just in case. When I pulled the cover off my yellow relay, it was obviously burned up from a short or whatever. Toast....but I have another on the way. Meanwhile, I'm running with the bypass.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. |
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10-17-2015, 02:57 PM
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Join Date: Jan 2004
Location: "The Natural State"
Posts: 1,001
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Nice fix!
 Sent from my "Driving Shoe Phone"
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the911den.com Instagram / UberPorsche930 https://www.youtube.com/channel/UCg4ZbACRJsODXgnlMVZsjEg?view_as=subscriber |
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10-17-2015, 03:01 PM
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Preferred pronoun:Maestro
Join Date: Sep 2012
Location: Group W Bench
Posts: 11,351
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Poor Slavs were deprived of quite the prize, done in by good old 'Merican ingenuity.
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When in doubt, use overwhelming force. Last edited by Norm K; 10-18-2015 at 05:28 AM.. |
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10-17-2015, 03:33 PM
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Join Date: Apr 2007
Location: Seattle
Posts: 3,032
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Too funny. I keep a 2"-3" piece of wire in my map pocket to bridge the terminals as well as a 10" piece for grounding the over boost sensor.
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81 Pacific Blue 930 Euro coupe slicktop on a strict diet, Rarlyl8 headers, Blowzilla turbo, Tial waste gate, Full bay I/C, Home made center out exhaust, Leask WUR, MSD 6AL, PLX wideband Wevo shifter, LSD. Next up, Cams, Heads and port work |
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10-17-2015, 05:47 PM
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Wayah Road Warrior
Join Date: Jun 2002
Location: Greenville, SC
Posts: 1,536
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I made a jumper.
The jumper is made from #12 wire soldered at the tips to keep the stray wires under control. I removed the yellow relay and jumped pins 87 & 87a.  Turned on the ignition and the pumps started right up. OK ..... so we know we can jump the relay. Next I printed out the instructions (Post #6 of this thread Yellow boost relay issues ) with pin numbers and such. Attached the jumper to the instructions and also taped a couple of toothpicks onto my rescue sheet (to help secure the wires into their holes ... I am a Shadetree mechanic after all).  Put the rescue sheet into my glovebox and I am now good to go in the event of a Yellow Relay Failure.
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02 996tt White 87 930 GP White (Sold) 87 911 Targa Guards Red(Sold) |
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10-17-2015, 05:54 PM
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Join Date: Sep 2008
Location: Rockland Co.New York
Posts: 809
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Dumb question, wouldn't it be easier to carry an extra yellow relay around?
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Tim 87 930:G-50 5 Speed, Powerhaus Headers, K-27, Garretson Intercooler, RarlyL8 exhaust and 1 bar boost.... Gone: 85 911:Wevo shifter,full adjustable suspension,bigger torsion bars,Carbon fiber hood,930 brakes and rims. |
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10-17-2015, 08:04 PM
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Crotchety Old Bastard
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Even dumber question; why not FIX the problem and never worry about it again?
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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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10-18-2015, 03:28 AM
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Forced Induction Junkie
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If you're going to create an "emergency" jumper wire, I would recommend putting one of those inline fuse kits in socket location 87 & 87a. I do not remember if the relay winding circuit is fused from the factory or not, but jumpering without protection could be risky.
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Dave '85 930 Factory Special Wishes Flachbau Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P |
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10-18-2015, 08:34 AM
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Registered
Join Date: Oct 2013
Location: Seattle, WA
Posts: 1,086
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Quote:
http://www.pelicanparts.com/catalog/SuperCat/0812/POR_0812_ELSWCH_pg5.htm#item19
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- 86 Porsche 930 - Mr.Hyde - 86 BMW 635CSi - Dr.Jeykell - 2006 Infiniti M45 Sport https://medium.com/@crashingdoor |
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10-18-2015, 11:25 AM
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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,403
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Friends, I meant this post to just be informative and to give us something to flap our lips about, plus I thought it was kind of funny as I did the McGiver thing, looking for something suitable to get me running. That yellow relay is pivotal to fuel flowing and sometimes they give up the ghost...and sometimes it's something entirely different. Keep a piece of wire on hand, just in case, or a spare relay. Or, put a fuse in line of this bridge (as already mentioned) and permanently do away with the relay. You will lose the safety feature that keeps the pumps from running until the fuel metering arm is drawn down when cranking the engine.
And by the way, the bridge is between 87A and 30 (for my 1987 anyway) - the relay contact points that provide the ground connection to the two fuel pump relays. See the diagram below. 
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. Last edited by mark houghton; 10-18-2015 at 11:52 AM.. |
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10-18-2015, 11:42 AM
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Banned
Join Date: Nov 2001
Location: top of 3rd
Posts: 4,336
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Quote:
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10-18-2015, 12:46 PM
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Banned
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,559
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^^^
There is absolutely nothing that can save Paul's  !!!Think, 25lbs of ground beef that's been out in the TexAss sun for about a week!!! |
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10-18-2015, 01:32 PM
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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,403
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Quote:
What's a mere two inches. Put that in metric, and we're talking a whopping 5.8, and that's only when bored.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. Last edited by mark houghton; 10-18-2015 at 02:46 PM.. |
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10-18-2015, 02:41 PM
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Registered
Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,291
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Ok guys riddle me this....
My '84 has never had a yellow relay, instead there has always been a standard "red" relay # 911-615-108-01 in that location, presumably as a replacement/fix/band aid? However I have put 60,000 miles on the car with it in place without any issues. Pumps only run when they are supposed to, shut off when they are supposed to, relay never gets hot, never a hick-up. So could all of you guys just keep a standard cheap red relay in your glove box instead? Super fast to swap out, much quicker than stuffing a jumper into the holes. Mark |
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10-18-2015, 02:44 PM
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Banned
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,559
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Quote:
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10-18-2015, 02:45 PM
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Registered
Join Date: Jul 2008
Location: Central Washington State
Posts: 4,403
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Quote:
Some years allow the simple red relay, and I don't know what the cuttoff year is, but I do know that for 1987 it no-workie. Sure would be nice if it did. Just grab the red off something like the AC and get home.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, B&B intercooler, stock 3LDZ. |
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10-18-2015, 02:51 PM
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Join Date: Apr 2007
Location: Seattle-ish
Posts: 1,291
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Hey there Mark,
Maybe it is a ROW thing, as mine is a gray market era car???? Mark |
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10-18-2015, 02:57 PM
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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If you put a red relay in place of the yellow relay in an early '87 USA model you will burn up a wire under the relay panel when the ignition is turned on. Don't try it.
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10-18-2015, 03:24 PM
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Join Date: Apr 2007
Location: Seattle
Posts: 3,032
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Yep, the ROWs don't have the yellow relays. Pretty sure it's just the 86-89
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81 Pacific Blue 930 Euro coupe slicktop on a strict diet, Rarlyl8 headers, Blowzilla turbo, Tial waste gate, Full bay I/C, Home made center out exhaust, Leask WUR, MSD 6AL, PLX wideband Wevo shifter, LSD. Next up, Cams, Heads and port work |
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10-18-2015, 04:13 PM
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Registered
Join Date: Dec 2012
Location: Seattle
Posts: 8,942
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I came up with a slightly more elegant jumper when I was trouble shooting. The loose wire just wasn't working all that well for me.
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1982 911 Targa, 3.0L ROW with Webers |
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10-18-2015, 08:10 PM
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78 Porsche 911SC 3.0L, 3.3Turbo soon. 
1985 Porsche 930 Fac. Slantnose 3.3l
