MY Engine service soon light just came on. So I did the gas pedal trick lol, and got into diagnostics and I pulled the code P0302 Which means Cylinder no 2 misfire.

Has anyone had this problem? and how did you go about fixing? I might have to take it into the dealer but I would like to hear if anyone else had their Z throw this sort of code.

 

Change the plugs..The stock plugs have a horrid gap!!!

 

What is the gas pedal trick and for all flamers stuff it I am not going to search!

 

i also got that after the TS ecu flash.

went to the one step down colder spark plug and no problems since.

daking knows what he is talking about!

 

HOW TO SET DIAGNOSTIC MODE II (SELF DIAGNOSTIC):

1- Turn ignition to "ON" position and wait 3 seconds
2- Fully depress and release accelerator pedal 5 times in 5 seconds
3- Wait 7 seconds, then fully depress accelerator pedal for approximately 10 seconds until the MIL starts blinking
4- Fully release accelerator pedal (ECU has entered diagnostic mode)

The ECU will blink 10 times to indicate the start. After that, error codes are read by counting the blinks. For example, to read error codes 456 and 458, the ecu will blink 10 times, pause, blink 4 times fast, pause, blink 5 times fast, pause, blink 6 times fast, pause, blink 4 times fast, pause, blink 5 times fast, pause, blink 8 times fast, pause, lather-rinse-repeat.

HOW TO CLEAR THE ECU OF ERROR CODES:

1- Get into diagnostic mode
2- Fully depress pedal for more than 10 seconds and the ECU will only blink 10 times

 

Is there any info on how to change the plugs??

 

I haven't had that problem on my Z, but I DID have it on my I30. (check engine light, etc). As it's under warranty, I took it in and the tech told me that new cars (not sure if that's ALL new cars) have the coil built in to the plug wires, and apparently one of the wires to one of my cylinders briefly failed, causing the computer to signal check engine light. This may not apply to us/you, but I thought I'd throw it out there-
Regards-
TB

 

Well today the light went away... I wanted to take it to the dealer but if theres no light will they check it? or give me some phony answer like 'it was probably bad gas, the gas cap' ???