check engine "p0306" when cold

[doodledo824]

well i know it's a cylinder "6" misfire. if i reset the ecu code it will only trigger cold. idle is about lumpy and sputtery when cold at idle. I replaced all 6 plugs and the coil in that particular bank. problem still exists. when warm cars runs and idles flawlessly. Even if i shut it off and turn it on warm runs perfect. Help please.

 

[CJ3Flyr]

well i know it's a cylinder "6" misfire. if i reset the ecu code it will only trigger cold. idle is about lumpy and sputtery when cold at idle. I replaced all 6 plugs and the coil in that particular bank. problem still exists. when warm cars runs and idles flawlessly. Even if i shut it off and turn it on warm runs perfect. Help please.

Move the #6 coil to another cylinder and see if the code follows the coil.

 

[doodledo824]

did that and the code stays on cylinder 6

 

[chaz]

heres something similar to your problem. maybe pm the josh & see whats it might be. Oily Spark Plug On A 4th Gen and Misfires On Cyl 6... HELP!!!! - Toyota 120 Platforms Forum also, check for a bad injector.

 

[doodledo824]

what stumps me is that it runs perfect and won't trigger a code during warm start up. Warm start ups are smooth and it doesn't sputter. When cold it's lumpy and sputter but only for about a minute. Once everything is warm everything is perfect.

 

[chaz]

heres another somewhat similar problem with the #6. huh, seems others have had it also. funny if it turned out to be the gas your using. anyway, riverrider is pretty up on this stuff. http://www.toyota-4runner.org/4th-gen-t4rs/44469-intermittent-rough-idle.html

 

[doodledo824]

yeh they are saying gas but i run super since company pays for gas..lol shhh don't tell them..

i've googled this and it could be a host of things. I don't think it's anything that serious because if it was i'm sure it would run like shit all that time. i've read alot about the injector and even catalytic converter.

 

[chaz]

ive found this site somewhat helpful in the past. http://www.2carpros.com/index.htm or this http://www.obd-codes.com/p0306