1999 Pontiac Montana engine

Tiny
NANCYELLEN
  • MEMBER
  • 1999 PONTIAC MONTANA
  • 143,000 MILES
Turns over won't stay running, while running she will. Back fires. Replaced knock sensor. Timming chain. Removed exhust. Replaced fuel filter and injecter. While running she runs rough but will not run for more than a couple of mintues. Sounds like she cannot let go of air.
Friday, August 9th, 2013 AT 6:58 AM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What's been done to this up until now?

I assume the check engine light is on. What are the code numbers.

How did this problem start?

When were any ignition components changed last?
Was this
answer
helpful?
Yes
No
Friday, August 9th, 2013 AT 9:14 AM
Tiny
NANCYELLEN
  • MEMBER
  • 4 POSTS
The check engine light came on when the van died the code said random miss fire. The van was find till she just shut down and didn't want to run, there are no other codes, after the battery had to be charged there are no other codes or engine light on. She never backedfired before. Ignition components have never been changed by me. The timming chain has been replaced, the knock sensor also has been replaced. Took the exhust pipe off to see if that would help nothing changed
Was this
answer
helpful?
Yes
No
Friday, August 9th, 2013 AT 3:08 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
" ignition components have never been changed by me."

What ignition components and when was the question
Was this
answer
helpful?
Yes
No
Friday, August 9th, 2013 AT 3:12 PM
Tiny
NANCYELLEN
  • MEMBER
  • 4 POSTS
You asked the question about the ignition components
Was this
answer
helpful?
Yes
No
Friday, August 9th, 2013 AT 5:12 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
I asked which parts and when.
Was this
answer
helpful?
Yes
No
Friday, August 9th, 2013 AT 5:16 PM
Tiny
NANCYELLEN
  • MEMBER
  • 4 POSTS
No parts have been changed since purchased this van six years ago
Was this
answer
helpful?
Yes
No
Saturday, August 10th, 2013 AT 3:34 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You could have an issue with the Ignition Control module, Crank sensor or one or more coils. This will probably require the use of a lab scope and some in depth component testing.
Was this
answer
helpful?
Yes
No
Saturday, August 10th, 2013 AT 4:02 AM

Please login or register to post a reply.

Related Engine Runs Rough Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE