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#29365 12/12/2002 12:09 AM | Joined: Jul 2001 Posts: 140 Shop Shark | | Shop Shark Joined: Jul 2001 Posts: 140 | How would you go about testing an ignition coil to see if it works or not? My truck will not start at all, and I checked everything and now im down to the coil. thanks! 
Jonathan S. Keffer
Certified Yeti Trainer
Richard Roy Schlicht-
Good Grandfather, Veteran Wrench Turner...
"If it ain't broke, fix it 'till it is..."
Es gibt nichts, zu befürchten, aber befürchtet sich.
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#29366 12/12/2002 12:20 AM | Joined: Apr 2002 Posts: 146 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2002 Posts: 146 | If the coil is in the truck. Pull the high voltage wire from the center of the dist. cap. Hold the end near the block and have some one crank the engine. It should spark over half an inch away. If it has no spark or just a small spark it's shot. Careful how you hold the wire or you will get shocked. If it's out of the truck. Most parts stores will test them.
if it dosen't need fixed, break it
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#29367 12/12/2002 3:14 AM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | I like to do it by flicking the points open with a screwdriver, then you know if the whole system is working or not. Check your wire from the points to the coil to make sure it isn't grounded out.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
#29368 12/12/2002 3:59 AM | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I think the test I read looks for a spark that will jump 1/4" in air. | | |
#29369 12/12/2002 4:27 AM | Joined: Dec 2001 Posts: 31 Member | | Member Joined: Dec 2001 Posts: 31 | Some months ago I had my truck quit and I started with the basics; fuel, coil, pionts ect. and still had a truck that wouldn't start. Ended up being the rotor. The end that presses against the cap was a rivit and the moisture thru the years made it rust and wouldn't let the spark travel to the plugs... Just a place to look.
Good luck!
Thomas Mott
1949 GMC 250
1957 Dodge COE c-700
1959 Chris Craft 17' w/big journal 327 for more power
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