I change my mr bov to the stock one, use the car for one day no problem. Then go to gas station an fill up the tank with 93 octane. At the moment i leave the gas station i turn on my car and the a/f ratio don't raise from 10.1 then after 15 seconds the a/f ration began to raise to 14.5. I start moving. I do a full stop in a light when i began to move i 1st. gear i have to brake and the car idel for a second and the p0300 appear. I turn off the cel with a scaner but again but this time in the highway the code appear

Can this could happen for a bad gasoline ? I am going to install the mr bov again just in case. And i will fill up again the tank in another gas station to verify if this goes off.

 

I just had a P0300 code. I changed my plugs and it went away. It's happened twice to me and both times it was changing hte plugs that fixed it.

 

Had po300 every 20 miles .
Changed plugs form brP7es@.25" to br7es@.022" (with out the protruding electrode).
No po300 in 2 weeks , knock on wood .
Not saying this is a fix-all po300 but it worked for me .

 

yes, dont overlook very common maintenance like plugs. I changed mine after 32k to denso IW22's and I rev faster and no po300 ever again. I also went to get the dealer reflash.

 

Call me if the problem comes back

 

Change to mr bov, fill with another 93 gasoline brand. turn off the code with the obdc and until now the p0300 disappear.