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911 SC just died

My '78 SC just died. Running fine has gas. Just quit like someone flipped a switch.

Where do I start? Swapped FI relays, no love. Fuses all good.

Old 03-20-2012, 01:37 PM
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ROW '78 911 Targa
 
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Do you hear your cdi box squealing?
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Old 03-20-2012, 02:00 PM
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Ignition on, airbox cover off, lift air meter lever, are injectors squealing, (let go fast).
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Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
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Old 03-20-2012, 02:02 PM
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If yes to above then check for spark.
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Old 03-20-2012, 02:03 PM
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Thanks guys. A couple of times it tried to fire, so I assume it has a spark. It was too noisy where it was parked to hear anything fuel pump/injection related. Good news: it died 5 blocks from a pretty good independent foreign shop with plenty of VW/Porsche/Audi/BMW experience, so I had AAA take it there. If it's not something simple, I'll take it down to my good buddy who's dad was the premiere Porsche mechanic in our little town for 20 something years.
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'78 911SC (gone home to the Fatherland)
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Old 03-20-2012, 03:52 PM
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man, the first thing is to take the air cleaner off and check for fuel by lifting the air sensor plate..the first. dollars to donuts the shop does it first.
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poof! gone
Old 03-20-2012, 04:15 PM
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Hope you don't need a new CDI !

BOSCH Ignition Module/Control Unit,0 227 300 004 - oehq.com
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Old 03-20-2012, 10:02 PM
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Now in 993 land ...
 
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Do you have a pop-off valve? Did it pop and not seat back all the way?

HTH,

George
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Old 03-20-2012, 10:54 PM
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Yes, and no.
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'78 911SC (gone home to the Fatherland)
'92 968 CAB
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Old 03-21-2012, 02:53 AM
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Quote:
Originally Posted by Brown747 View Post
You and me, both.
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David #476
'78 911SC (gone home to the Fatherland)
'92 968 CAB
Beck Spyder #201
Too many bikes to list
Old 03-21-2012, 02:54 AM
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If it is the CDI you can send it out to be fixed for a couple hundred bucks. Not a big deal.
Old 03-21-2012, 03:36 AM
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If it is the CDI I have several sources for used ones that won't even cost that.
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David #476
'78 911SC (gone home to the Fatherland)
'92 968 CAB
Beck Spyder #201
Too many bikes to list
Old 03-21-2012, 08:08 AM
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Quote:
Originally Posted by vash View Post
man, the first thing is to take the air cleaner off and check for fuel by lifting the air sensor plate..the first. dollars to donuts the shop does it first.
My only hope is that it's something stupid I could have fixed by the side of the road had I been more knowledgeable. Like the time my Volvo 145 died in the middle of nowhere and I walked 20 miles to make a phone call to have a friend come tow me 100 miles home, only to find out all that had happened was a fuse (NOT in the fuse block) for the K-Jetronic had blown.

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David #476
'78 911SC (gone home to the Fatherland)
'92 968 CAB
Beck Spyder #201
Too many bikes to list
Old 03-21-2012, 08:13 AM
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died

A disconnected CDI would do just that !
Happened to me and it cost me $ 300 in towing.
Old 03-21-2012, 09:11 AM
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The good news? Turned out to be a badly corroded wire between the fuse and the FI relay. Back on the road. The bad news? The shop is a little more expensive that my buddy's "lunch and gas money" hourly shop rate to fix something like this.


Quote:
Originally Posted by ArticSilver84 View Post
A disconnected CDI would do just that !
Happened to me and it cost me $ 300 in towing.

AAA, all the way. It was still 1.5hrs of shop time, for basically the same issue. The wire was so badly corroded is was only passing 2.6V's to the CDI.

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David #476
'78 911SC (gone home to the Fatherland)
'92 968 CAB
Beck Spyder #201
Too many bikes to list
Old 03-21-2012, 02:48 PM
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