3rd cylinder misfire code 73
I first read the codes and they came up 71, 72, 73, 74, 9, 68. I replaced Spark plugs/distributer cap and rotor, now it is only code 73 coming up. I check all the plugs again and all were white except for the 3rd which was dark brown. i swapped the third plug wire with a friends working plug wire. no change. It idles pretty rough, but drives fine. any suggestions what this could be? should i change the fuel filter? something to do with the catalytic converter? is it running to lean? vacuum leak? no sure where to go from here..
Cars & Trucks
Answers & Comments
Okay, a Honda. I don't see a code 68 for that though. Code 9 is number 1 cylinder position sensor-this sounds like a crank position sensor? That may be the problem.
If you have multi port injection, check that injector 3 is pulsing and putting gas into the cylinder.
A new fuel filter wouldn't hurt, but I doubt it is causing a problem in only one cylinder. Check for vacuum leaks. Change the plug for #3. If still no help, check fuel pressure. Doesn't sound lean, either, although if fuel pressure is low, it might be. Spark plugs that are white is an indication of lean running, BUT I doubt that your plugs have been run long enough to determine that.
Yes, code 67 is "cat. converter system". Guess you will have to check that. Doesn't necessarily mean it is bad, the cat, sometimes the code is set when it is just a little under par performance, like 95% efficiency. Bang on it, if no rattles might be alright, just under performing.///There should be a test for your crank sensor, sorry, I do not know it though. You would probably have to consult a repair manual, Travis.
i will give it a few love taps for sure. I have three things to do now! thank you for the help! i will be able to try these out tomorrow after work. I will let you know how i fair.