SPONSORED LINKS

My 1999 Chevy Blazer with the 4

Tiny
CHRISCAMPBELL96
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 153,000 MILES
My 1999 chevy blazer with the 4.3l vortec v6 has cylinder 4 misfire. I have replaced the plugs, wires, rotor, and cap multiple times. The coil wire is arcing at the coil and distributor cap; which is what I believe is causing the misfire. What is causing the coil to arc? Is the arcing causing the misfire?
SPONSORED LINKS
Monday, February 4th, 2013 AT 8:04 PM

16 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Most likely that is causing the problem. Have you replaced the coil wire?
Was this
answer
helpful?
Yes
No
+1
Monday, February 4th, 2013 AT 8:57 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
Yes, I've replaced the coil wire every time I've replaced the wires.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Monday, February 4th, 2013 AT 9:04 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Is the coil cracked? Explain exactly where the arc is located.
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:05 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
I have not found a crack in it the only thing I have found is that it moves a little bit on the mounting bracket. It's arching right where the wire connects to the coil and then where the other end of the wire connects to the distributor cap.
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:15 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Can you tighten the mount? Also, have you checked for cracks?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:19 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
The coil still has rivets in it from the factory holding it to the bracket. I have once but I'll go look it over again.
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:21 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
Where is a crack in the coil most likely to be at?
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:23 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Near where the coil wire goes on. Is it arcing to the mount?
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:25 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
I didn't find a crack but I guess there is always a possibility of a hairline crack. I don't believe it's arcing to the bracket but I can't check right now bc it's not dark outside
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:32 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Let me know
Was this
answer
helpful?
Yes
No
Monday, February 4th, 2013 AT 9:38 PM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
Ok after taking a closer look it looks like it is arcing at the side of the coil and the possibly traveling back to the distibutor cap. I ordered a new one and hopefully that will do the trick. If it doesn't work whatelse could be causing it to arc?
Was this
answer
helpful?
Yes
No
Tuesday, February 5th, 2013 AT 12:50 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
That is a very good question. We'll try one thing at a time. Are you sure the plug wires you got are made for your vehicle? Are they quality wires?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, February 5th, 2013 AT 1:53 AM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
The plug wires are acdelco and exact fit for my blazer.
Was this
answer
helpful?
Yes
No
Tuesday, February 5th, 2013 AT 1:59 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Okay, sometimes cheap wires can cause problems. It was just an idea.
Was this
answer
helpful?
Yes
No
Tuesday, February 5th, 2013 AT 2:00 AM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
Yeah I was told the vortec doesn't like the cheap wire or anything in the ignition wise. That's why I bought all acdelco parts
Was this
answer
helpful?
Yes
No
Tuesday, February 5th, 2013 AT 2:05 AM
Tiny
CHRISCAMPBELL96
  • MEMBER
  • 10 POSTS
Well I got the coil and icm replaced, but the misfire is still there
Was this
answer
helpful?
Yes
No
-1
Thursday, February 7th, 2013 AT 9:36 PM

Please login or register to post a reply.

Related Engine Wiring Content

VIEW MORE

Sponsored links