General Tech Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

2004 Cadillac Deville coil on plug, how do you test them?

Old 12-14-2012, 07:18 AM
Junior Member
Thread Starter
Join Date: Dec 2012
Posts: 3
Default 2004 Cadillac Deville coil on plug, how do you test them?

Help, I have a 2004 Cadillac Deville base model that has a p0300 misfire code, it was running very rough, this happened 2 years ago too. Last time it was one bad coil and I replaced the whole bank and replaced the spark plugs, still had the problem, brought it to the repair shop and they found one of the new coils to be bad too and charged me $280 for just labor, this time I replaced the bank of coils that I didnt the last time and still have the problem. What terminals do you check for resistance on each seperate coil and what should the ohms be? I dont want to buy another rack of coils if I can use some of the old ones, the car has 187000 miles on it. I used a spark tester to test the coils, but that isnt a true test, under pressure is when they fail if they are weak. Im going to get a new set of spark plugs today to see if that helps, but I did that last time and it didnt.

Last edited by chris2363; 12-14-2012 at 07:27 AM. Reason: More info.
Related Topics
Thread Starter
Last Post
General Tech
10-17-2012 07:47 AM
General Tech
06-04-2007 04:30 PM
Cadillac Man
Cadillac CTS
12-06-2006 11:40 PM

Thread Tools
Search this Thread
Quick Reply: 2004 Cadillac Deville coil on plug, how do you test them?

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.