Coil test - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
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post #1 of 6 (permalink) Old Feb 28th, 04, 11:24 AM Thread Starter
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Join Date: Jul 2001
Location: Columbus, GA
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Question

I finally got around to installing an original style coil (#293) in my car since purchasing it from a vendor a few months ago. Now the car will barely start and when it finally does, it runs like crap.
Is there a way to test the coil for correct resistance, etc..?

Dave, member number 7704
2000 Dodge Viper GTS
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post #2 of 6 (permalink) Old Feb 28th, 04, 11:47 AM
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Coils don't very often go bad with a couple of exceptions. First, if the ballast resistor or resistor wire is missing they will over heat. Second, if the coil is laying on it's side, the cooling oil won't cover the windings and can allow it to burn up internally.

First off, make sure you dont' have + and - reversed. To test the coil, you need to take a resistance measurement. Measure from the high voltage lead to the - terminal. I'll take a measurement for you later to compare, but for now I'll guess you'll see a few hundred ohms. Next, measure from the + terminal to the - terminal. I'm guessing about 15 ohms.

Other things that can cause poor ignition are bad points or improper dwell, grease on the points from an over-greased dist. shaft or rubbing block will do it. Also, a bad condensor will make it run poorly - especially at hiway speed or part throttle cruising. If you suspect the condensor, take it off for and see if the misfire diminishes.

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #3 of 6 (permalink) Old Feb 28th, 04, 02:01 PM Thread Starter
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Thanks for the quick response.
The coil is located in it's original configuration.
I will try a new condenser first. If that doesn't solve the problem, I will try the prior coil.
I just hate that I paid big money for an 'original' type coil for no reason.

Dave, member number 7704
2000 Dodge Viper GTS
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post #4 of 6 (permalink) Old Feb 28th, 04, 03:32 PM
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Join Date: Oct 2000
Location: Puerto Rico
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Is the factory original style coil so much different in external appearance than an aftermarket coil, like an MSD Blaster II? It is red in color and you can always paint it black. JMO. I understand a 100% original car deserves the original style tho.
>>This may help on the coil troubleshooting. Coil test

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post #5 of 6 (permalink) Old Mar 3rd, 04, 01:45 AM Thread Starter
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I finally got around to wrenching on the car. I reinstalled the old (replacement) coil and it fired right up and ran fine.
I guess that I will be contacting the parts supplier about a replacement.

Dave, member number 7704
2000 Dodge Viper GTS
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post #6 of 6 (permalink) Old Mar 19th, 04, 03:32 AM Thread Starter
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Update.
I returned the bad #298 coil last week and received another one this week. Installed it and the car started and ran fine.

Dave, member number 7704
2000 Dodge Viper GTS
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