p0300 code
#1
p0300 code
I have an 06 3.7L v6 with 99000 miles and this code keeps appearing for a random misfire. iv taken it in and its an 06 so I don't believe its a vacuum leak. theres been seafoam cleaner put into the cylinders to remove excess carbon which has helped a bit but not fully. fuel injector cleaned and that didn't help either. the mechanic says now its a valve compression problem saying valve 4 has about 80% compression. I don't know if that's fully whats going on because this Is the 3rd different prognosis they've given me. plus it does still run fairly well just the cel wont go off. any ideas?
#2
#3
I have an 06 3.7L v6 with 99000 miles and this code keeps appearing for a random misfire. iv taken it in and its an 06 so I don't believe its a vacuum leak. theres been seafoam cleaner put into the cylinders to remove excess carbon which has helped a bit but not fully. fuel injector cleaned and that didn't help either. the mechanic says now its a valve compression problem saying valve 4 has about 80% compression. I don't know if that's fully whats going on because this Is the 3rd different prognosis they've given me. plus it does still run fairly well just the cel wont go off. any ideas?
The computer has no way of knowing what the spark looks like, so it won't give you a CEL, all it knows is that it's occasionally stumbling.
Last edited by Alfons; 09-13-2013 at 07:37 AM.
#4
yes that's exactly what happens actually!
#5
#6
I had one once, never popped back up. THis code can also happen from a dirty or malfunctioning MAF sensor. I had this happen on my Crown victoria, and it was the same day that I got really cheap gas. I ran the tank empty, put techron fuel system cleaner in the tank, and I filled it up. I think I had bad gas since it hasn't happened since. USually if a coil is bad, it will pop up a code for an exact cylinder that is misfiring. Hell, this code can also happen from dirty injectors.
#7