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No spark from plug wires,possible problems??
#158791
11/29/08 01:11 PM
11/29/08 01:11 PM
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Anonymous
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It is a 74 440...
I took the coil wire off at the distributor cap and it is firing there when I try to crank it.It has NO spark at any of the plugs.What are the most likely problems and are there some type of tests to troubleshoot it? Thanks,Allen
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Re: No spark from plug wires,possible problems??
[Re: gtx6970]
#158795
11/30/08 01:33 AM
11/30/08 01:33 AM
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Re: No spark from plug wires,possible problems??
#158796
12/03/08 01:56 PM
12/03/08 01:56 PM
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Replaced rotor button and distributor cap.Any ideas on how to test other components that could be faulty.As I mentioned before,it HAS a spark at the coil wire but NO spark at the plugs
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Re: No spark from plug wires,possible problems??
#158797
12/03/08 02:16 PM
12/03/08 02:16 PM
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what the heck is a rotor button? like a muffler bearing?
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Re: No spark from plug wires,possible problems??
#158798
12/03/08 04:09 PM
12/03/08 04:09 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
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Lincoln Nebraska
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when you pul the coil wire out of the dist & hold it 1/4" from ground & crank w the key you have multiple regular sparks? You've replaced the cap/rotor button,that would only leave the plug wire(s)as you're going downstream from the cap to the plugs unless something is not copacetic with the new cap/rotorbutton(I like the sound of that) that you just replaced.
live every 24 hour block of time like it's your last day on earth
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Re: No spark from plug wires,possible problems??
#158800
12/03/08 04:46 PM
12/03/08 04:46 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
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Cucu I thought you were just being a bit facetious on hump day. that's what they call a rotor over in England.
live every 24 hour block of time like it's your last day on earth
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Re: No spark from plug wires,possible problems??
[Re: buildanother]
#158802
12/04/08 08:33 AM
12/04/08 08:33 AM
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Quote:
You GOGGLED a BUTTON?  
sure did. i thought i was missing something on my rotor (ok now im being facetious- more facetiouness to come in the next sentence). maybe an old racers trick- installing a button is good for .02 seconds or something.
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Re: No spark from plug wires,possible problems??
#158803
12/04/08 09:06 AM
12/04/08 09:06 AM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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Button is in the cap, not the rotor.
Since you replaced the cap and rotor that leaves the distributor not turning.
Are you getting more than one spark at the coil wire? Because if you are only getting one spark check to see if the distributor is actually turning.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: No spark from plug wires,possible problems??
[Re: RapidRobert]
#158806
12/04/08 11:40 AM
12/04/08 11:40 AM
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Quote:
Quote:
Button is in the cap
Now we know for sure & it reminds me of my pre Mopar days when on an HEI the "rotor button" in the cap was replaceable. All that's left is for Allen to finish this out.
not too sure about that. I googled it remember and the links all said it was the rotor itself.
see http://wiki.answers.com/Q/What_is_rotor_button
http://www.latemodelrestoration.com/iwwi...01&comp=LRS
Now I do admit, the named rotor button does seem more likely to describe the little round carbon button in the cap but that isnt what the web is point to. besides, that button isnt replaceable without replacing the cap.
to solve this the op needs to provide more info. answer the questions asked above and a solution can be found
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Re: No spark from plug wires,possible problems??
#158807
12/04/08 02:00 PM
12/04/08 02:00 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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About to go away
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up yours
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Well,your links are wrong, there is no button shown, especially in the last link.
While there might be an application that has the button on the rotor rather than the cap in the OP's setup it's in the cap.
In any case the point is moot as he has replaced the cap and rotor, with what one assumes to be hte right parts that fit properly. This should negate the "button issue".
That leaves ONE thing, the distributor is not turning. I ran into a situation where the rotor was not turning on a slant six, long story why but basically the owner was a chucklehead. The coil would spark once per "key on/key off" cycle. This was with an electronic ignition setup.
If the PO is getting only one spark from the coil wire it would point to that, if he is getting multiple sparks then it wouldn't point to it.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: No spark from plug wires,possible problems??
[Re: Supercuda]
#158808
12/04/08 02:05 PM
12/04/08 02:05 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
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Posts: 27,347
Today? Who Knows?
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Quote:
Well,your links are wrong, there is no button shown, especially in the last link.
While there might be an application that has the button on the rotor rather than the cap in the OP's setup it's in the cap.
In any case the point is moot as he has replaced the cap and rotor, with what one assumes to be hte right parts that fit properly. This should negate the "button issue".
That leaves ONE thing, the distributor is not turning. I ran into a situation where the rotor was not turning on a slant six, long story why but basically the owner was a chucklehead. The coil would spark once per "key on/key off" cycle. This was with an electronic ignition setup.
If the PO is getting only one spark from the coil wire it would point to that, if he is getting multiple sparks then it wouldn't point to it.
 The button is the carbon button in the cap, most are solidly moulded into the cap but some are attached like an alternator brush with a copper strap & a spring, that style sometimes falls out & you get weak/no spark at the plugs...
& no rotor spinning = one spark... 
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Re: No spark from plug wires,possible problems??
[Re: 1_WILD_RT]
#158810
12/04/08 03:00 PM
12/04/08 03:00 PM
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Anonymous
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Quote:
Quote:
Well,your links are wrong, there is no button shown, especially in the last link.
While there might be an application that has the button on the rotor rather than the cap in the OP's setup it's in the cap.
In any case the point is moot as he has replaced the cap and rotor, with what one assumes to be hte right parts that fit properly. This should negate the "button issue".
That leaves ONE thing, the distributor is not turning. I ran into a situation where the rotor was not turning on a slant six, long story why but basically the owner was a chucklehead. The coil would spark once per "key on/key off" cycle. This was with an electronic ignition setup.
If the PO is getting only one spark from the coil wire it would point to that, if he is getting multiple sparks then it wouldn't point to it.
The button is the carbon button in the cap, most are solidly moulded into the cap but some are attached like an alternator brush with a copper strap & a spring, that style sometimes falls out & you get weak/no spark at the plugs...
& no rotor spinning = one spark...
im with you. I call the rotor a rotor and a cap a cap. calling a rotor a rotor button is a new one on me. I never had a name for the contact in the distributor
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