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1980 porsche 928 dead

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Old 08-20-2009, 11:16 PM
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kencarp
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Default 1980 porsche 928 dead

i was driving my car and it just died cranks fine gets fuel but no spark at plugs changed coil and ignition control box fuses ok but still no spark im kinda lost any help would be awsome thanks ken carpenter
Old 08-20-2009, 11:29 PM
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soontobered84
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Relay relay relay
Old 08-20-2009, 11:39 PM
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goodspeed928
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? GAS PUMP
Old 08-20-2009, 11:46 PM
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Richter12x2
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Originally Posted by goodspeed928
? GAS PUMP
"Gets gas, no spark." Speed reading kills. +1 for Ignition relay.
Old 08-20-2009, 11:47 PM
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kencarp
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which relay? thanks
Old 08-21-2009, 12:02 AM
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Richter12x2
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On my 1985 S car it's the #16 EZF Ignition Relay. I'm not sure if earlier cars used a computer for ignition or not. If they don't, it could also be the pickup on the distributor (or whatever tells the car to fire the coils).
Old 08-21-2009, 12:16 AM
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kencarp
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ok thanks 4 your help Richer12x2 i will replace the relay hope i can get it running before winters here
Old 08-21-2009, 12:21 AM
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docmirror
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#2 Ignition switch
#3 Green wire(if a 80 has a green wire)
Old 08-21-2009, 12:28 AM
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danglerb
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+1 Green wire.
Old 08-21-2009, 12:34 AM
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tveltman
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So I know I've got to watch out for the green wire, but can anyone explain briefly what it does and where it is? I know it's infamous, and I should search the archives to learn about it, but I just searched them for plastic spoiler repair for another lister and my drive to sift through old posts has been depleted at the moment ....Thanks!
Old 08-21-2009, 05:58 AM
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Niles
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Timing belt?
Old 08-21-2009, 08:56 AM
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DANdeMAN
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Bet on FI relay......
Old 08-21-2009, 10:23 AM
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Tampa 928s
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If your green wire is toast it will start briefly using the cold star inj, then die. You can measure the wire for opens or shorts, it provides a reference signal for the computer. Check your relay and your 14 pin connector near the front battery post for corrosion also.
Old 08-21-2009, 10:57 AM
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hacker-pschorr
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Originally Posted by docmirror
#3 Green wire(if a 80 has a green wire)
Euro no green wire - US car green wire.

Is there a fuel pressure gauge installed? If not, how do you know it's getting fuel?

Are the injectors firing (US car)? If you say yes, how do you know?

Have you tested for spark?


Other than the fuel pressure gauge, you can test spark and injectors (L-jet US car) with under $25 worth of tools from Harbor Freight.
Old 08-21-2009, 01:01 PM
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ajd0002
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just solved almost an identical problem on my '81, although mine would run for about 10 minutes then die...eventually would start up again. Green wire was only a couple of years old, but it was the Bosch connector to the green wire (passenger side) that was the issue, almost no connection. Strip back the insulation and repair, I used shrink-on and tape as the wires seemed a bit thin to solder.


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