Bad Cold Start with log and video

[spadepro22]

I have a problem in the mornings with this cold start up thing. When the rpms drop low the car sounds crazy and will cut off, but starts right back up. Can you guys help me out here? Here is a video link and log.


http://www.youtube.com/watch?v=KDnFLwQQY74

 

[spadepro22]

Help please

 

[WES_393]

Your O2 sensor voltage isn't cycling correctly and your wideband in the video shows the A/F ratio fluctuating quite a bit so that also points at the front O2. I had a similar issue and a new O2 fixed it.

 

[spadepro22]

Your O2 sensor voltage isn't cycling correctly and your wideband in the video shows the A/F ratio fluctuating quite a bit so that also points at the front O2. I had a similar issue and a new O2 fixed it.

New o2 installed.

 

[spadepro22]

Where's the help

 

[Diamond Star Werks]

are you revving it yourself or is it going up and down alone?

 

[spadepro22]

are you revving it yourself or is it going up and down alone?

I never hit the gas the hole video. It does it own its own.(until it warms up)

 

[____Kurt____]

My buddy dave (92nolatist) had a similar problem with his car, during a cold start. His a/f's went all lean like that and the exhaust had this real raspy/tinny sound to it. His airflow numbers, global, and deadtimes were off and fuel pressure was too low.

So I would check those two things first or contact him on here for more info..

 

[spadepro22]

My buddy dave (92nolatist) had a similar problem with his car, during a cold start. His a/f's went all lean like that and the exhaust had this real raspy/tinny sound to it. His airflow numbers, global, and deadtimes were off and fuel pressure was too low.

So I would check those two things first or contact him on here for more info..

thanks, I'll have to get someone to look into that for me, I have link but dont know how to tune