03-30-2019, 09:58 AM | #21 | |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
|
Re: No spark?
Quote:
|
|
03-30-2019, 10:06 AM | #22 | |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
Quote:
|
|
Sponsored Links (Register now to hide all advertisements) |
|
03-30-2019, 11:09 AM | #23 |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
I just thought of something that may be relevant. While i had everything apart for the rebuild, while doing the dizzy, after stripping it down, I had sandblasted and painted the distributor body (it's a cast iron one) and, IIRC I'm pretty sure I primed the inside of the housing to prevent corrosion. Is it possible that I am not getting an electrical contact somewhere due to the paint?. If so, where is the likely contact failure?.
|
03-30-2019, 11:54 AM | #24 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
|
Re: No spark?
The points have to have a path to ground through there moving in the distributor and the distributor itself has to be grounded to the block. That could well be the issue if there is not a clear path to ground for the distributor. Same applies to the capacitor.
|
03-30-2019, 11:55 AM | #25 |
Senior Member
Join Date: May 2010
Posts: 192
|
Re: No spark?
When you rebuilt the engine did you paint the timing cover and carefully put it on to avoid scratching the new paint? You may have insulated the distributor from ground.
|
03-30-2019, 01:09 PM | #26 |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
Sponsored Links (Register now to hide all advertisements)
|
03-30-2019, 02:31 PM | #27 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
|
Re: No spark?
There are three wires involved here, battery feed to - terminal on the coil, coil + terminal to dist (which you are shorting to ground to simulate opening and closing of the points) and the third wire is the heavy sparkplug type wire from the center of the coil you are holding near a good to check for spark.
|
03-30-2019, 03:47 PM | #28 |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
Yes. The heavy spark plug wire from the centre of the coil is what I am referring to as the "coil feed wire". I get no spark jumping to ground when I touch the + coil wire to ground. I get a spark at the jumper wire when it touches ground but nothing from the heavy coil feed wire. I tried two different coil feed wires to make sure that wasn't the problem.
|
03-30-2019, 06:08 PM | #29 |
Senior Member
Join Date: May 2010
Location: Ashland KY
Posts: 1,159
|
Re: No spark?
If it ran before it should run now!you saidyou painted everything ,on inside of dist !remove pains andget a good coil and condenser!its not rocket science,think it thru!!!
__________________
DON P |
03-30-2019, 08:48 PM | #30 |
Senior Member
Join Date: May 2010
Posts: 426
|
Re: No spark?
I have installed a new condenser in a tuneup only to have a no start. And you may have paint under the condenser mounting tab. I would try the condenser that you used before the rebuild.
|
03-30-2019, 09:15 PM | #31 |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
I did. I started with the condenser that worked before the rebuild but replaced it when I found I had no spark.
|
03-30-2019, 09:45 PM | #32 |
Senior Member
Join Date: May 2010
Location: CLAYTON DE
Posts: 1,283
|
Re: No spark?
After clearing the ground path of any new paint, squirt degreaser onto the point contact pads. If, by chance any goo was on the feeler gauge it can cause a no start. Good Luck.
P. S. Some starting fluids (ether ) include cylinder lubricant.
__________________
Enjoy yer day. Tom Hate can't fix what it started. Last edited by A bones; 03-30-2019 at 09:56 PM. Reason: PS |
03-31-2019, 12:15 AM | #33 |
Senior Member
|
Re: No spark?
touches ground but nothing from the heavy coil feed wire
Just a thought , to get a spark from the heavy feed wire you need a condenser involved ,one wire to + side of the coil and the condenser body tag grounded ,If you have replaced the points and if not set correctly then it wont work specially if one or the other point set is closed all the time , at some point the circuit must be broken .With some point sets available now ( not USA ones ) its hard to set them ,you could try and block off one set with a piece of paper then flick the other set it should throw a spark of the heavy feed wire , |
04-05-2019, 11:07 AM | #34 |
Senior Member
Join Date: Aug 2016
Location: Alberta
Posts: 930
|
Re: No spark?
UPDATE. Had a buddy come over and we spent a few hours trouble shooting. Went from no spark, to intermittent, (weak, strong spark) to good spark and got it running. Can't say what we did to improve spark but got it running. However, (and this could be related), I started it yesterday to take it out of the shop and turn it around to put it on the lift and while turning around outside, it just up and quit. Wouldn't restart so I pushed it in the shop. Checked this morning and no spark. Bypassed the ignition system (jumper wire from coil to battery) and still no spark. Pulled the dizzy cap and found that the rotor had broken. Was obviously catching on the cap contacts so now i need a new rotor. Question, how do I "fit" the new rotor so it makes proper contact and does not "catch" the cap contacts? The contacts in the cap show clear evidence of the roar hating them. [IMG][/IMG]
|
04-05-2019, 01:19 PM | #35 | |
Senior Member
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
|
Re: No spark?
Quote:
|
|
04-05-2019, 01:23 PM | #36 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
|
Re: No spark?
That is a problem, but it would not keep the coil from producing a spark, it would just keep it from being distributed.
|
04-05-2019, 04:04 PM | #37 |
Senior Member
Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
|
Re: No spark?
Another ( but related) point was made in one of the posts. To make spark and test the coil with a lead wire you must use a condensor in the circuit like the picture from above. Everyone should have a condensor wired with two clips and a wire ......
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|