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1997 Oldsmobile 88 1997 Not Starting P0300

Tiny
BRI2400
  • MEMBER
  • 1997 OLDSMOBILE 88
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I was on my way home from work last week and I noticed the temperature gauge starting to go up, almost to the point where it was about to overheat. I also noticed it was running slightly sluggish but managed to get home.

I let it sit for a day, it started up but the check engine light was flashing, it was also running really rough.

I let it sit another day and tried to start it today and I wont crank at all. I replaced the Ignition Control Module but that didn't do it. The code I am reading is P0300.

Any ideas of what else it could be, or I should try replacing? My thinking is that if it was plugs, wires, or coils it would at least start but run rough.

1997 Olds 88
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Saturday, April 17th, 2010 AT 2:10 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0300 is normally caused by vacuum leak and contaminated fuel. Also do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil
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Saturday, April 17th, 2010 AT 4:35 PM
Tiny
HWENICK
  • MEMBER
  • 2 POSTS
There was a recall in 2003 for a vacuum leak. Call olds and see if your car is listed for this recall. But my car still doesnt work right even after it is fixed. It causes serious damage! I got cylinder wash had the pump filter and regulator changed now I am showing a P0306.
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Thursday, April 29th, 2010 AT 4:02 PM

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