hey, my car wont start sometimes from what i believe is a bad ground somewhere... the engine turns over but wont fire up but then once in a while it will start, run for a while, then die... does that sound like a bad ground? and what grounds should i be checking? thanks guys

 

If it was a bad ground it would not turn over or turn over very weakly. When it does not start, check if you are getting codes.

 

the only code i had when it did start was bad 02 sensor and i replaced that and havent been able to start it since... any ideas??? im really gettin frustrated with this thing

 

Fuel pump fuse and/or relay gone bad. Did you check the O2 wiring when you replaced the sensor?

 

the fuse and the relay are both fine, i checked them both... and the wiring looked good on the 02 sensore when i just replaced it ... any other possibilities??

 

It kinda sounds like your crank sensor...

 

Or camshaft position sensor.