Are my coils bad?
Thread Starter
Instructor
Joined: May 2001
Posts: 146
Likes: 0
From: Saudi Arabia
Are my coils bad?
Shark not behaving as it should.
I'm suspecting the coils... for starters.
Question is: How do I know if they're bad? Are they supposed to have a certain resistance I can measure?
I'm suspecting the coils... for starters.
Question is: How do I know if they're bad? Are they supposed to have a certain resistance I can measure?
Cottage Industry Sponsor
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: Oct 2001
Posts: 25,823
Likes: 173
From: SF Bay Area, CA
I've been told that bad coils show mainly at high rpms, as they can't keep up with the demand then. You'd see your engine missing.
My rough idle was not caused by bad coils, and replacing them as a preventive measure did not change anything. Well, at least I now have two shiny new things in my engine compartment...
My rough idle was not caused by bad coils, and replacing them as a preventive measure did not change anything. Well, at least I now have two shiny new things in my engine compartment...
Thread Starter
Instructor
Joined: May 2001
Posts: 146
Likes: 0
From: Saudi Arabia
Oh well, guess it's not that then. Thought it might be something easy to eliminate. I still think your "Italian tuneup" is a great idea, Nicole. Starting the next phase of that plan tomorrow.
Racer
Joined: Feb 2003
Posts: 338
Likes: 1
From: Cumming, GA
The PRIMARY should have a resistance between .33 and .46 ohms. The SECONDARY should have a resistance between 7000 and 12000 ohms. (page 28-13 in Ignition systems if you have one).
The little resistors mounted on top are .35-.45
ohms for each one.
Bob
The little resistors mounted on top are .35-.45
ohms for each one.
Bob
Racer
Joined: Feb 2003
Posts: 338
Likes: 1
From: Cumming, GA
ALSO........not to be a smart-axx about this. MAKE SURE THE KEY IS OFF............or you will find out if they are good the other way. <img border="0" alt="[crying]" title="" src="graemlins/crying.gif" />
Bob
Bob
