confusing log

[JohnCIV_Talon]

I decided to do a log for the hell of it and it does not look very good. I have a t-25 stock injectors, 190 pump, runing 14-15 psi.

rpm timing o2 1 bank1
3304 28 .00v-17%
3480 28 .00v-17%
3636 29 .00v-17%
4032 21 .00v-0%
4664 7 .00v-0%
5296 10 .02v-0%
5816 12 .02v-0%
6292 16 .04v-0%
6664 19 .04v-0%
6980 20 .06v-0%


I may have a boost leak, would that cause this? Is my o2 sensor out?

 

[JohnCIV_Talon]

Anyone?

 

[JohnCIV_Talon]

Heres a better log.Take in mind I can only do these in second gear(have no third). Im assuming something is wrong with my o2 sensor. can someone confirm this?. Also my timing looks wierd up until 4300 why? can someone please help me out on this, its worrying me.

2352 30 .02
2396 29 .00
2456 28 .00
2524 28 .00
2588 28 .08
2664 28 .08
2776 28 .08
2920 18 .08
3096 10 .06
3316 6 .06
3564 5 .02
3832 5 .00
4164 0 .02
4376 8 .02
4664 9 .02
4908 10 .02
5400 11 .04
5636 12 .04
5860 14 .04
6044 16 .04
6252 18 .04
6400 19 .06
6572 19 .06
6712 20 .06
6856 20 .06
7004 20 .06
7204 21 .08

 

[DankDSM]

You defenetly need to replace your o2 sensor and check for boost leaks. After this repost a log.

 

[JohnCIV_Talon]

Alright, just wanted that confirmed. Would this cause any damage to my car? Will it make it run a lot worse then it should?

 

[titogs95]

Alright, just wanted that confirmed. Would this cause any damage to my car? Will it make it run a lot worse then it should?

Yes you will have poor MPG. Since that is one of the main reason your car use O2 sensor. BTW the ECU doesn't use the O2 sensor while you are at wide open throttle (WOT).

Also, since you are a 2G you have to tune with the Timing advance. Ideally it need to be around 17. I will recommend you to get a Wideband if you want to tune at WOT. Don't trust your O2 reading (well, it can give you an idea.)

Does the O2 sensor oscillate at Idle or Crusing? does it oscillate fast? (The car has to be warm before you check this).

 

[JohnCIV_Talon]

Hi, no it would pretty much stat at .02.

 

[titogs95]

Hi, no it would pretty much stat at .02.

Ok replace the O2 sensor.
Try to get an OEM O2 sensor.

 

[PieEyedPiper]

www.sparkplugs.com
$63 shipped for a Denso OEM o2 sensor.

Also you need to be making better logs.
Include RPM, Timing, TPS and 02 values.

When are you hitting the gas? In the first log it looks as late as 4k and the second log maybe 2800rpm?
Hit the gas at 2500rpm and let off at 6500-7k.

Also in your profile it says 750cc injectors and a DSMchip, they are not in use and your ECU is stock with the stock 450's correct?