| Interesting no-start condition - HEI Ignition [message #227338] |
Mon, 28 October 2013 09:39  |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma:
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Senior Member |
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Greetings !!
Here's a peculiar one...
I was messing around with my 1973 GMC 23 footer this weekend and decided to hook up the non-operating tachometer. It's and old EQUUS digital display with buttons for Water Temp, Oil Temp, Volts, RPM, Outside Temp, and Inside Temp. The voltage display worked just fine - none of the others did - I just figured things weren't connected to the sending units.
The tach was my first target - and I discovered a disconnected wire at the HEI distributor TACH connection. I couldn't really determine if the wire had broken at the connector or had been cut.
I crimped on a new connector and slid the wire (white) onto the TACH connector of the distributor. Looked perfect - correct length, correct routing...
But - with this wire connected - the engine just cranks and cranks - no starting. And when I disconnect this wire - it fires right up !!
I can see that the wire routes up to the dashboard but I haven't traced it yet.
I figured that the old digital tach display had some wierd electronics that might be affecting things - so I unplugged the display/control unit. All that is in place is the wiring harness... Still the same symptoms.
My second thought is that the wire erroneously grounded by being pinched somewhere.
So... any thoughts as to what could cause this connection to take away my spark ??
I'm expecting questions about the Equus display unit wo I'll look for info and post a picture of it later.
Thanks in advance for any ideas !!
Steve W
Southern California
Steve W
1973 : 23'
Southern California
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