security system
 

how do you know if its the crank sensor or the security system?
mine will crank an try to start but wont start. it was running fine an got a miss
then quit all together,
checked all fuses. had new plugs an wires installed a month ago.

Do you know if the mis-fire was truly resolved? I ask because I recently dealt with a misfire that while diagnosing it in my driveway went to a full "no start" situation. That specific incident was a bad ICM.


If it is the anti-theft/security system, you will see the message "Security" on the dash.

the security light is on but not flashing. i had the security reset last year at the dealer.
i will try the ICM an new coil packs an see if that helps.
thanks for the advice

I rarely see coils fail. The auto parts stores can test an ICM, but I'll warn you:
If the test fails, I would call that safe to trust.
If the test passes, you are still not out of the woods.


Last time I dealt with this, I used a $5 harbor freight spark test light (you connect it inline with a spark plug wire). When using it, I found a specific position with very weak spark (light barely lit while cranking). All other positions, the light was strong. Swapped the coils, the weak spark did NOT follow the coil, it stayed in the same location (validating the coil was fine).
Hope this helps!

ok i replaced icm, coil packs,plug wires an plugs.
still getting code 300.
i was told it might be the fuel injectors.
what do you think?
dont wanna start replacing those to
an it not be the problem.

Do you have access to a scan tool that can read which cylinders are mis-firing? That will help narrow this down as a p0300 means "multiple mis-fire".

You can begin looking for relationships. It could be a bad injector, maybe a vacuum leak or a failing fuel pressure regulator....

well i swear my car is possessed.
drove it a while. misses pretty bad.
reread the codes now it says
code 332 ..knock sensor
an code 132... upstream o2 sensor. which is new
im about to give up