| Tach dipped suddenly and died, restarted with no trouble [message #100889] |
Fri, 24 September 2010 16:34  |
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Tom Fort
Messages: 51
Registered: January 2004
Karma: 0
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After driving about 100 miles I stopped at a traffic light and was watching the tach. It suddenly dipped and the engine died. It restarted immediately. I drove to the next light and just in case it was going to happen again, I shifted to neutral. Suddenly, the tach dipped and I was quick enough to step on the accelerator enough that it didn't die. I drove through another 10 miles of traffic and it didn't happen again. I don't think it was vapor lock because there wasn't anyother problem. I checked the vaccuum connections and they were tight. I also checked the spark plug wires and all seemed tight.
Any ideas as to what might have caused the problem and what to do to fix it?
Thanks for your suggestions,
Tom
Tom Fort, KA4KGR
73 Painted Desert, Family owned Since 1973
Lugoff, SC
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| Re: Tach dipped suddenly and died, restarted with no trouble [message #100891 is a reply to message #100889] |
Fri, 24 September 2010 16:38  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Did the tach just dip to a lower reading, or go to 0? If it went to 0, I would suspect a component in the ignition system is trying to die. Jim Bounds had a recent failure where a component in the ignition system became intermittant and then left him stranded. I think carrying a few spare ignition parts is probably good insurance. Of course, you can count that it won't be one of them that fails on your coach, but you may be able to help someone else out. Good karma has a way of rewarding.
Good luck tracing the problem.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Tach dipped suddenly and died, restarted with no trouble [message #100925 is a reply to message #100899] |
Fri, 24 September 2010 23:40 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Tom, a '73 had points and condenser and no module. If no conversion was made to HEI, then it is a simple points, condenser, and coil. On those systems the points are the weakest link. Generally, a significant decline in performance occurs before total ignition failure due to bad points. I would recommend carrying a spare set of points and condenser. Or better yet, converting to an HEI distributor.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: [GMCnet] Tach dipped suddenly and died, restarted with no trouble [message #100928 is a reply to message #100889] |
Sat, 25 September 2010 00:00 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Tom,
In a word - vapor lock! Er . . . two words.
Log into the Forum and you'll find HEAPS of messages discussing this
problem.
Regards,
Rob M.
USAussie
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Tom Fort
Sent: Friday, September 24, 2010 5:34 PM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Tach dipped suddenly and died, restarted with no trouble
After driving about 100 miles I stopped at a traffic light and was watching
the tach. It suddenly dipped and the engine died. It restarted immediately.
I drove to the next light and just in case it was going to happen again, I
shifted to neutral. Suddenly, the tach dipped and I was quick enough to step
on the accelerator enough that it didn't die. I drove through another 10
miles of traffic and it didn't happen again. I don't think it was vapor lock
because there wasn't anyother problem. I checked the vaccuum connections
and they were tight. I also checked the spark plug wires and all seemed
tight.
Any ideas as to what might have caused the problem and what to do to fix it?
Thanks for your suggestions,
Tom
--
Tom Fort, KA4KGR
73 Painted Desert, Family owned Since 1973
Lugoff, SC
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http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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