Will Not Start
Thread Starter
5th Gear
Joined: Jul 2016
Posts: 5
Likes: 0
Will Not Start
Hey Guys,
My 1974 is turning over but no spark. I have changed the batter, rotor button, points and rotor cap but nothing. I am getting power to the coil but it seems a little weak on my test light. Any ideas?
My 1974 is turning over but no spark. I have changed the batter, rotor button, points and rotor cap but nothing. I am getting power to the coil but it seems a little weak on my test light. Any ideas?
Thread Starter
5th Gear
Joined: Jul 2016
Posts: 5
Likes: 0
No, its been sitting for a number of years, Im not getting anything other that positive to the + side of the coil. Its not going any farther that that.
Le Mans Master
Joined: Jan 2001
Posts: 9,238
Likes: 221
From: Dryden MI
Did you check to see if rotor is spinning? Is the carburetor getting fuel? Did you pull the wire off the coil and check for spark? T is hard to see in sunlight. After sitting, the fuel lines and filter could also be plugged with sludge and rust.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Hopefully the fuel is even good enough to ignite and run the engine.
I assume you set the dwell also???? Because just installing points in the distributor is not all that needs to be done...they need it be adjusted and set.
And I have seen a few times where the advance weights cannot move and advance and spring back due to sitting for a long time.
DUB
I assume you set the dwell also???? Because just installing points in the distributor is not all that needs to be done...they need it be adjusted and set.
And I have seen a few times where the advance weights cannot move and advance and spring back due to sitting for a long time.
DUB
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
test for spark coming from coil, very carefully hold coil wire about 3/16" from gnd. point.
use insulating tool to hold coil wire, have someone turn over starter, Spark Yes or No ?
No ... your trigger (points) or coil is not working.
Yes, your Dist is not doing it's job correctly.
use insulating tool to hold coil wire, have someone turn over starter, Spark Yes or No ?
No ... your trigger (points) or coil is not working.
Yes, your Dist is not doing it's job correctly.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,033
Likes: 9,155
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
check all the ground wires on the frame.
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Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
pull off the cap and rotor. look at the points. are they opening when you turn the distributor by hand? if you have power to the coil, and the grounds are good, you can physically make a spark by using a screwdriver to manually open and close the points quickly.
put your DMM on the points and verify they are grounded when closed and infinite when open.
test both primary and secondary windings on the coil. what are the readings on those?
put your DMM on the points and verify they are grounded when closed and infinite when open.
test both primary and secondary windings on the coil. what are the readings on those?