o2 sensor bad?/First Log

[b0dhi]

OK so finally got my first datalogger in, log'd a run and seemed to prove to myself that my car is running to lean? I changed all my spark plugs and they were all white, and smelled bad (hence a lean condition?) If this is so, I'm having a hard time figuring out why. When i changed
the plugs and decided the car was running lean, i even turned the boost down to 10psi just to be on the safe side. The log was also taken with this same psi setting.

Mods:

b16g Turbo
550cc Fuel Injectors
Walbro 255hp fuel pump
ACT 2100 Clutch
2.5" upper intercooler pipe
MBC
2.5" Bushar Turbo back exhaust
JDM 6-bolt

Here is the log 3rd gear pull / 10psi.

TIMA FTRL FTRM FTRH FTO2 O2-R TPS MAFS RPM KNCK
28° 118.6% 99.8% 118.6% 99.8% 0.84V 96.5% 490.6Hz 2625 0
24° 118.6% 99.8% 118.6% 99.8% 0.80V 100.0% 585.0Hz 2813 1
21° 118.6% 99.8% 118.6% 99.8% 0.80V 100.0% 761.1Hz 3000 0
19° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1006.4Hz 3219 0
16° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1188.8Hz 3531 0
17° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1283.2Hz 3781 0
18° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1415.3Hz 4125 5
16° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1547.3Hz 4406 5
17° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1604.0Hz 4625 4
17° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1604.0Hz 4906 3
17° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1604.0Hz 5156 2
18° 118.6% 99.8% 118.6% 99.8% 0.84V 100.0% 1604.0Hz 5406 3
19° 118.6% 99.8% 118.6% 99.8% 0.82V 100.0% 1604.0Hz 5563 9
18° 118.6% 99.8% 118.6% 99.8% 0.82V 100.0% 1604.0Hz 5781 8
16° 118.6% 99.8% 118.6% 99.8% 0.82V 100.0% 1604.0Hz 5969 14
15° 118.6% 99.8% 118.6% 99.8% 0.78V 100.0% 1604.0Hz 6156 21
18° 118.6% 99.8% 118.6% 99.8% 0.57V 100.0% 1604.0Hz 6188 29
22° 118.6% 99.8% 118.6% 99.8% 0.86V 12.9% 144.7Hz 5531 1

Any ideas on how to fix this, not feeling real comfortable driving the car with that kinda knock. I own my own business and bought this car because i enjoy working on it, and want to eventually race it. Money is not a problem within reason. Although I'm a complete newbie and have buried myself into research on DSM's, thanks in advance for any help you guys can give me.

 

[b0dhi]

*edit*

Just checked the fuel injectors and they are stock 450's NOT 550's.

Now checking the fuel pump, to make sure it has been switched out.

 

[ivanr4g63]

Do you have an aftermarket Fuel pressure regulator?

Your fuel trims are rather high, though it does seem like you're o2 sensor could be going dead... does your logger reads injector duty cycle? if so what is when WOT?

If you indeed have a 255 FP you'll most likely need a FPR.

 

[b0dhi]

INJP
8.70ms
11.26ms
14.59ms
14.85ms
15.36ms
15.87ms
15.87ms
16.64ms
17.66ms
17.15ms
16.90ms
16.90ms
15.87ms
15.10ms
11.52ms
13.82ms

Those are all at WOT in conjunction with the previous log

Also , just checked the fuel pump it is a Walbro 255hp thank god.

And as far as i know, its the stock FPR in the car right now.

 

[speedy13]

can a bad o2 sensor cause knock?I have a similar problem when i log.And in my logs,it seems that the o2 sensor gets lazy here and there.

 

[gsturboman]

my friend had a knock like yours and his logging read like yours and he reaplaced the front and rear o2 sensors and it stopped the bad knocking and ran better.

 

[b0dhi]

Ya i think im going to just go with a wideband o2 sensor, I think it will help. As well as bigger injectors.

 

[crankbender]

What do you have for fuel management?

 

[gsturboman]

o2 should take care of the problem. those o2 will work that you are getting.

 

[b0dhi]

As far as fuel management, nothing right now.

In process of researching what i want to get. So far leaning towards ECU+ with a gm maf.

Seems to be the cheapest/best option for me (see thread ECU+)