SPONSORED LINKS

2006 Chevy Colorado Multiple Misfire

Tiny
GAVIN1029
  • MEMBER
  • 2006 CHEVROLET COLORADO
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 59,000 MILES
I had a misfiring problem and brought it to Autozone. They ran a diagnostics on it and said it was a number 1 misfire. I changed all the sparkplugs and the number 1 boot. It started running great and my gas mileage went up to where it should be. I drove it about 300 miles and it started running poorly again. I brought it back to Autozone and they ran another diagnostics on it and said it was a number 1 misfire again. I was told to switch the number 1 boot withthe number 3 boot to see if it changes from number 1 misfire to a number 3 misfire. If so it was a bad boot. I did that and brought it back to them for a third diagnostics check and now it is saying multiple random misfire. I was wondering what I can do to fix the problem myself. And maybe if it could be the box where all 4 wires run to. Please help. Thanks
SPONSORED LINKS
Wednesday, June 16th, 2010 AT 11:28 AM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Random misfire is normally caused by vacuum leaks and bad fuel.
Was this
answer
helpful?
Yes
No
+1
Wednesday, June 16th, 2010 AT 5:10 PM
Tiny
GAVIN1029
  • MEMBER
  • 4 POSTS
So what what I need to check for a vaccum leak?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, June 16th, 2010 AT 5:16 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You can use a vacuum gauge, or listen to a hissing sound around the intake manifold and vacuum hoses.
Was this
answer
helpful?
Yes
No
Wednesday, June 16th, 2010 AT 5:18 PM
Tiny
GAVIN1029
  • MEMBER
  • 4 POSTS
So should I go ahead and change all four coils? Or maybe just the number 1 and 3 coil and see what happens. I know they are like 60 something dollars a piece.
Was this
answer
helpful?
Yes
No
Wednesday, June 16th, 2010 AT 5:27 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the no.1 cylinder compression and injector disregard the coils at this time till you rule out this two
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, June 16th, 2010 AT 5:32 PM
Tiny
GAVIN1029
  • MEMBER
  • 4 POSTS
How would I go about checking num 1 cylinder compression and injector. I really don't know too much about engines. Just the simple things.
Was this
answer
helpful?
Yes
No
Wednesday, June 16th, 2010 AT 5:43 PM
Tiny
BYATES
  • MEMBER
  • 1 POST
You need to clean your throttle body, it is easy and cheap
Was this
answer
helpful?
Yes
No
Tuesday, June 22nd, 2010 AT 2:36 PM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links