have a dreadful code p0300

[hikneeken]

my check engine light came on with the code P0300 random misfire recently after changing my front cam seals to stop a oil leak, in the process of course as everyone knows i had to take off the timing belt to get to the cam seals

once i got the p0300 for the first time i just disconnected the coils and re plugged them and disconnected the neg batt terminal.... the code did not show up until 100+ miles later

now i have the p0300 code again, where to start now?

one thing i like to add, don't know if it pertains, the sensor? under driver cam was covered in oil... not the crank pos sensor near crank sprocket.... i don't know what the senor near driver cam is but thought i might add the info

edit: i guess that sensor is cam pos sensor, is there a way to check if it is operational, don't want to have to install a new one if unnecessary

[buggzyy]

The sensor is working because the engine starts. it will run if you disconnect that sensor after the engine is running. I would have to say you may have the belt off a tooth if anything. start there

[hikneeken]

thanks buggzyy you have been really helpful with the oil leak and now this

UPDATE: i didn't want to check timing belt because it would take time to take everything off so i checked the coil packs

all of my secondary resistance are within standard value but NONE of my primary coils are within standard value
passenger side 1.5ohm , middle 4.5ohm , driver side 1.5ohm
standard value for primary coil is .74-.90ohm

so question is are all of my primary coils done or just the middle one? and what bank is the middle one because parts only have bank 1 and bank 2 listed?
thank you

[cwic]

I belive all the coils are split and fire to both bank 1 & 2.

[hikneeken]

bump

is the coil the problem?

MD314583 is this the part #, and why is it so expensive compared to MD314582.... is it because i get to coils
does anyone know oem maker for ignition coil?
and does the brand matter?
thanks

[hikneeken]

well looks like now all three primary tests at 1.5 ohm... still above standard value .74-.90hm but i pulled that off the free service manual so don't know if it is really correct for a 2002 xls

can someone verify standard value for primary coil

how would i test to see if crank and cam pos sensor are good are there values in ohms or volts that i could test for?

any help would be appreciated, i would like to test the easily accessed items first before having to spend acouple of hours taking the timing belt off again if that is the problem

[cwic]

bump

[jerryirish]

try unbolting your coils clean surface rebolt. i did mine code did not come back