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Could you tell me why my check engine light flashes and then my car stalls and wont start for thirty mins

Tiny
PEEWEE35
  • MEMBER
  • 1997 PONTIAC BONNEVILLE
  • 178,000 MILES
When I start my car it will run for awhile and then my check engine light will flash rapidly and my car will stall and not start for thirty mins my security light stays on at all times as well
Tuesday, October 11th, 2011 AT 6:15 PM

17 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The light will flash for a missfire but not rapidly. If it is flashing like that, it sounds like a problem with a power or ground to the pcm. I would look first at the battery cables. Clean them completely. Otherwise, you may be looking at a failing pcm.

Roy
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Tuesday, October 11th, 2011 AT 6:34 PM
Tiny
PEEWEE35
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One of the codes on my 97 pontiac bonneville is multipal cylinder misfire I changed the coil packs plugs and wires what else could be the problem if it keeps dyin and not starting for over 30 mins
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Tuesday, October 11th, 2011 AT 9:26 PM
Tiny
ASEMASTER6371
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It could be a fuel pump seizing up when hot.

I was more concerned on how your check engine light was acting. That does not sound normal at all.

The crank sensor will cause a 300 code as well.

Roy
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Tuesday, October 11th, 2011 AT 9:41 PM
Tiny
PEEWEE35
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  • 13 POSTS
Well it did come up with a 307 or 301 code the last time I checked it how hard would it be to change the crank sensor
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Tuesday, October 11th, 2011 AT 10:38 PM
Tiny
ASEMASTER6371
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There is no 307. 301 is amissfire in number 1 cylinder. It could be a bad plug, wire, coil, a bad injector, low compression or a vacuum leak. A crank sensor will not repair this code.

You need all these items checked.

Roy
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+1
Tuesday, October 11th, 2011 AT 10:43 PM
Tiny
PEEWEE35
  • MEMBER
  • 13 POSTS
Ok it was a 301 cuz it said multiple misfire in cylinder 1 I will check theses other things and let you know how it turns out thank you very much for your expert advice. Cuz I was goin nuts tryin to figure this out
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Tuesday, October 11th, 2011 AT 10:48 PM
Tiny
ASEMASTER6371
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Just to let you know, 300 is multiple missfires, 301 is specific to number 1 cylinder

Roy
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Tuesday, October 11th, 2011 AT 11:23 PM
Tiny
PEEWEE35
  • MEMBER
  • 13 POSTS
And not to mention there was a duplicate 300 code ill have it testes again and give you the specific codes.I already know about the code for bank 1 o2 sensor
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Tuesday, October 11th, 2011 AT 11:37 PM
Tiny
ASEMASTER6371
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That code will go away when you repair the miss. The sensor is unable to adjust fuel due to the miss fire.

Roy
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Tuesday, October 11th, 2011 AT 11:43 PM
Tiny
PEEWEE35
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How would I correct the code 300
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Tuesday, October 11th, 2011 AT 11:59 PM
Tiny
ASEMASTER6371
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First get the 301 resolved. When you do that, it most likely will go away like your oxygen sensor code.

Roy
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Wednesday, October 12th, 2011 AT 12:04 AM
Tiny
PEEWEE35
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  • 13 POSTS
Well thank you very much I will get it takin care of and see what happens I really apriciate your time
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Wednesday, October 12th, 2011 AT 12:12 AM
Tiny
ASEMASTER6371
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No problem, good luck
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Wednesday, October 12th, 2011 AT 12:23 AM
Tiny
PEEWEE35
  • MEMBER
  • 13 POSTS
I found the codes for my 97 pontiac bonneville they are po171 and po300 how would I correct these two codes?
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Wednesday, October 12th, 2011 AT 2:29 PM
Tiny
ASEMASTER6371
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171 is a lean code. The long term trim is out too far. Could be a vacuum leak, mass air flow sensor, low fuel pressure or a pcv valve. It is best for a shop to track it down as it gets expensive throwing parts at it that dont fix anything.

The 300 is a random missfires. Did you resolve the 301?

Roy
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Wednesday, October 12th, 2011 AT 10:05 PM
Tiny
PEEWEE35
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Yeah the 301 code is gone all that comes up now is the 171 and the 300
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Wednesday, October 12th, 2011 AT 11:45 PM
Tiny
ASEMASTER6371
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Ok, like I said the 171 is either a vacuum leak, mass air flow, fuel pressure or pcv.

The 300 is a random missfire and needs to be checked. It could be a crank sensor but the age and mileage leads me toward the injectors.

This all needs to be checked.

Roy
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Thursday, October 13th, 2011 AT 1:34 AM

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