wiring problems
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Joined: Apr 2003
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Originally Posted by RR4E
When checking/adjusting timing.
Unplug the vacuum advance(hose on the front of your distributor) Plug it off with something like a golf tee(these work really well for a plug). Then hook up your timing light, and start the truck. You will set your timing from there, and once that's done, re-connect the vacuum line.
Unplug the vacuum advance(hose on the front of your distributor) Plug it off with something like a golf tee(these work really well for a plug). Then hook up your timing light, and start the truck. You will set your timing from there, and once that's done, re-connect the vacuum line.
Posting Guru
Joined: Nov 2004
Posts: 1,137
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From: Asheville, NC
The Duraspark III has no vacuum advance. Duraspark III uses a sensor that is mounted above the harmonic balancer for timing. It is not adjustable. My computer gets HOT sometimes. The timing is allover the place, especially at 3000 rpm. I want a DS-2 distributor to install that will CURE the problems that I am having with my current system. I know how to wire it. I just dont have the $$$ to go and buy a brand-hammer new system! Thanks for the replies...
Senior User
Joined: Jul 2005
Posts: 258
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From: Black Hills South Dakota
In order to time the Duraspark III system, disable the SPOUT signal at the distributor. This makes the timing stay put where you set it. Reconnect it once it's timed. I believe it's the second wire down on the distributor's module, yellow with a large disconnect plug. On my truck this plug was defective and never actually connected the wire, so I removed it and wired them straight together.
The correctly operating system advances or retards the timing on the fly, using input from many sensors. If a single sensor fails, it produces an error code and substitutes a default value for the broken sensor. If several inputs have failed, it resorts to a fail-safe or "limp home" mode.
From other posts here, I've read where the timing signal appears to be all over the place as the system adjusts itself rapidly and continuously.
That's not to say there isn't a problem if the timing swings too wildly. This is just what I've read here or in my manual.
On my rig, the power wire to the computer was unhooked, plus it had the defective SPOUT connector as I mentioned above. There was no timing advance at all and the engine would only run well in one narrow range of throttle.
I've tried to get it running, but there's too many sensors botched up, so I'm installing a remanufactured 1972 point distributor, eliminating the computer entirely and going back to vacuum advance. Something I can understand and work on, at least!
-Ed
The correctly operating system advances or retards the timing on the fly, using input from many sensors. If a single sensor fails, it produces an error code and substitutes a default value for the broken sensor. If several inputs have failed, it resorts to a fail-safe or "limp home" mode.
From other posts here, I've read where the timing signal appears to be all over the place as the system adjusts itself rapidly and continuously.
That's not to say there isn't a problem if the timing swings too wildly. This is just what I've read here or in my manual.
On my rig, the power wire to the computer was unhooked, plus it had the defective SPOUT connector as I mentioned above. There was no timing advance at all and the engine would only run well in one narrow range of throttle.
I've tried to get it running, but there's too many sensors botched up, so I'm installing a remanufactured 1972 point distributor, eliminating the computer entirely and going back to vacuum advance. Something I can understand and work on, at least!
-Ed
Last edited by SmokyOlFord; Jul 20, 2005 at 09:58 AM. Reason: typo
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Joined: Nov 2004
Posts: 1,137
Likes: 2
From: Asheville, NC
my DS-III system is carbureted. There is alot of damaged emission equipment on this motor, along with a long-gone VV carburetor that was replaced with a regular 2bbl Holley carb. The DS-II system will cure many of the problems that I am having.
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