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

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

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

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

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

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

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

Just to let you know, 300 is multiple missfires, 301 is specific to number 1 cylinder

Roy

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

that code will go away when you repair the miss. the sensor is unable to adjust fuel due to the miss fire.

Roy

how would i correct the code 300

first get the 301 resolved. when you do that, it most likely will go away like your oxygen sensor code.

Roy

well thank you very much i will get it takin care of and see what happens i really apriciate your time

no problem, good luck

i found the codes for my 97 pontiac bonneville they are po171 and po300 how would i correct these two codes?

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

yeah the 301 code is gone all that comes up now is the 171 and the 300

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