I got a P0307 code and promptly changed the spark plugs, ignition wires, cap and rotor. the code came back. i am wondering if it is a weak injector. What ohms should a injector be at?
by Visitor in Carmichael, CA on March 14, 2010
P0307 Cylinder 7 Misfire DetectedPossible Causes Setting Conditions
Base engine mechanical fault that affects only one cylinder
Check for air leaks in the Air Induction system (e.g., in the intake manifold)
Check for air leaks in the EGR system and in its related hoses and/or valve
Check for air leaks in the PCV system and in its related hoses and/or valve
Fuel delivery component fault that affects only one cylinder (e.g., a contaminated, dirty or sticking fuel injector)
Ignition system problem (coil or plug) that affects one cylinder
Engine speed less than 3,000 rpm, adaptive numerator updated, and the PCM detected a misfire rate of 1-2% (High Emissions 2T), or a misfire rate of 6-30% (Catalyst Damaging 1T) in a single cylinder. Note: If the misfire is severe, the MIL will flash on/off on one trip!
This code sets in 2 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp)
I have a misfire in cylinder 3 . everything from sensors to spark has been checked. all checks out in good working condition. but, when the engine is cold and you start it up ,there is a tapping noise that sounds like lifters or valves tapping for a minute then goes away. there can be an internal problem also with the crank/ camshaft. that will throw a misfire code.