cylinder 3 misfire, after intake gasket change

[leehyunggyun]

Hi everyone,

1st time newbie home mechanic here.

I am currently getting cylinder 3 misfire code, after intake gaskets are installed.

Here's what happened:

• installed intake gaskets and reassembled
• detected cylinder 1 misfire only
• cleaned cylinder 1 spark plug & wire connectors and cleared the code
• detected cylinder 5 misfire only
• cleaned cylinder 5 spark plug & wire connectors and cleared the code
• detected cylinder 3 misfire
• checked all of the spark plug wires resistance
• found cylinder 2 wire was bad. (over 20k ohms/meter)
• replaced all six spark plugs and wires.

Could you take a look the sensor reading and give me some advices? (please refer to the OBD reading attached)


There was a few excellent threads about cylinder 3 misfire issue. I hope mine is not as bad as the other ones...

http://www.automotiveforums.com/t954...3_misfire.html

http://60degreev6.com/forum/showthread.php/45899-Misfire-driving-me-nuts




Thanks in advance!

[leehyunggyun]

Hi everyone,


Just following up, this was due to over torquing the lower intake manifold. The rear side of the intake ports are cracked and letting external air in!!

I did replace it with a used one, along with the head gaskets this time. I still have trouble starting the car. I will post another thread.

Thanks,