96 LT1, code P0300 thrown.
Thread Starter
Racer
Joined: May 2004
Posts: 392
Likes: 0
From: VA
96 LT1, code P0300 thrown.
I have a 96 LT1, that throw the P0300 code, which is Multiple Cylinder Misfire. I checked all the spark plug wires and various sensors and that checked out to be okay. I leaning toward a bad optispark as the car started stumbling and hesitating and harder to start. Does anyone here know if code P0300 leads towards a bad optispark on 96 vettes? Thanks in advance for any help. By the way the vette has over 70k miles.
Racer
Joined: Mar 1999
Posts: 423
Likes: 0
From: Austin Texas
It took new O2 sensors and one fule injector to cure the P0300 my LT4 issued a little over a year ago. The shop manuel has a long list of things to do to try and isolate what is causing the general misfire code. I ended up paying out the nose for GM to find and fix it.
Good Luck!.............MickyD
Good Luck!.............MickyD
Racer
Joined: Jul 2003
Posts: 446
Likes: 1
From: Washington PA
I have the same problem. I replaced all my plugs/wires, new opti/water pump, new converters, and all new O2 sensors. I have the code 0300 and 0131 (bank 1 sensor 1 low voltage to o2 sensor) I am gong to get one new O2 sensor and hope that cures it, I also have a used set of injectors on the way.
Not sure about replaceing your opti cap and rotor. If you are going to go that far, I would replace the entire unit...you might want to try what MickeyD suggested first.
Darin
Not sure about replaceing your opti cap and rotor. If you are going to go that far, I would replace the entire unit...you might want to try what MickeyD suggested first.
Darin
Thread Starter
Racer
Joined: May 2004
Posts: 392
Likes: 0
From: VA
Yeah, I have relaced a o2 sensor about a year ago on this car, code # P0157, Circuit Low Voltage (Bank 2 Sensor 2) and that cured the problem but this time the car is getting harder to start and is stuttering and hesitating leading me to think its ignition related. I appreciate all the sugestions though as they might help me in the long run, thanks again guys.
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Originally Posted by Sinister87
...Does anyone here know if code P0300 leads towards a bad optispark on 96 vettes? ...
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Thread Starter
Racer
Joined: May 2004
Posts: 392
Likes: 0
From: VA
The water pump doesn't seem to be leaking as it was one of the first things I checked. Tried to start the car yesterday wouldn't start up. I'm going to order the MSD cap and rotor to see what happens and move on from there. I'll let you guys know if it fixes it, thanks again.
