my first log

[civic619]

Hey guys I just logged my car. Could someone interpret what this means?

TIME xRPM xTIMING xO2 Voltage
0.63 x2124.0 x22.0 x0.04
1.26 x2428.0 x16.0 x0.18
1.89 x2772.0 x19.0 x0.14
2.53 x3164.0 x15.0 x0.62
3.14 x3612.0 x10.0 x0.94
3.78 x4212.0 x9.0 x0.96
4.41 x4848.0 x7.0 x0.84
5.04 x5400.0 x5.0 x0.32
5.68 x5932.0 x8.0 x0.08
6.3 x6464.0 x8.0 x0.06
6.93 x6880.0 x11.0 x0.04
7.56 x7244.0 x13.0 x0.04
8.19 x6016.0 x39.0 x0.0
8.85 x4632.0 x36.0 x0.0
9.48 x3512.0 x24.0 x0.0
10.1 x2544.0 x23.0 x0.0
10.74 x1652.0 x22.0 x0.0
11.37 x1128.0 x10.0 x0.0
11.99 x1000.0 x16.0 x0.62
12.62 x896.0 x16.0 x0.76
13.24 x848.0 x10.0 x0.0
13.89 x820.0 x9.0 x0.0
14.52 x772.0 x9.0 x0.0

 

[doodie]

What kinda mods do you have? I logged my car today too, but not enough road to do a real good log. I was getting 16 counts of timing at 5500rpm. Car pulled really good.

 

[civic619]

16 counts of timing? hmm dont you mean degrees? or where you refering to knock? but i see you have a 2g in which they dont have a knock sensor.. anyway,

if you notice after 5400RPM my o2 voltage DROPS fast.. i have no clue what is causing that. could be low fuel pressure or what.

my mods:
ported 14b
rre ic piping
rre 3" dp
apexi n1 3"
rre MBC set @ 15psi
rewired FP
rre test pipe
injen intake
ported o2 housing

 

[evotuner]

looks to me you are running a little lean from 3600 up. Is your o2 sensor shot? Those o2 readings don't look right. did you log knock count?

 

[psychlow]

EDIT: Nevermind

2G's do indeed have a knock sensor, but you just can't log them.

 

[civic619]

that o2 sensor only has 15k miles. so its fairly new. It will cycle at idle BUT when i rev it it goes lean. then will stay lean back on idle for a good 30-40 seconds, then the voltages bounce 0.2-0.8 as it should.

any ideas?

attached are a picture of my plugs:

what do you think

 

[psychlow]

Yeah, looks a little on the lean side, agreed.

 

[kpt4321]

The plugs looks a little lean, but looking at a picture of plugs from that far away is hardly conclusive.

Was that full throttle?

It looks like you have a knock problem.

 

[dave99gst]

Originally posted by civic619
Hey guys I just logged my car. Could someone interpret what this means?

hehe that always cracks me up.

what are we looking at here 1st gear? 2nd 3rd ??
the log should be a 3rd gear pull from 2-3k RPM to redline.
if thats what it is .. ya can leave out the stuff after time=7244
i dont like seeing your timming going up and down like that.
did you just STOMP on the gas in 3rd? or did ya give it some.. then a little more later in the RPM's ? a basicly stock 2g.. should be able to get like 20-25 deg of timming at the top of 3rd.

 

[civic619]

dave gst,

this was done in 2nd gear at WOT.

 

[dave99gst]

Originally posted by civic619
dave gst,

this was done in 2nd gear at WOT.

do another in 3rd. most people agree this is the gear you should tune in ( your in it the longest in a 1/4 mile run )

 

[out there]

agreed, log 3rd to redline... that way to can figure out why it feels bogged down between 5k and 5600. ok, so maybe you don't have that problem

 

[civic619]

Hey guys,

I did a few logs.. I think my first o2 sensor is bad... but it cant be since it has only 15k miles.. but then again, who knows?

why do I say this.. well

upon my log today, I watched BOTH o2 sensors.. the first one goes lean after 4500rpm, while the 2nd o2 sensor reamains at 0.89 which is good.

Do you think the first o2 sensor is bad, sending wrong signals to the ECU, therefore screwing up the timeing?

 

[psychlow]

I don't believe the ECU even cares about the O2 sensor reading at WOT. If timing is being reduced, it's usually due to knock, I believe.

 

[ColonelOdem]

what software are you running? TMO, MMCD? laptop, Palm m100, IIIC?

 

[civic619]

ODBII Pocket Logger.

 

[dave99gst]

Originally posted by psychlow
I don't believe the ECU even cares about the O2 sensor reading at WOT. If timing is being reduced, it's usually due to knock, I believe.

sorta true -- but knock is also a direct cause of running lean. heance o2 readings are helpfull.

 

[civic619]

This is taken from www.pocketlogger.com


The O2 Volts is an indication of air/fuel ratio as measured from the O2 sensor. In closed loop mode, the ECU uses this sensor as it's feedback sensor to base any fuel trim adjustments.

The O2 Trim is a trim for that sensor. This allows the ECU to compensate for differences in sensors. Trims that are abnormally high or low *can* be an indication of a bad O2 sensor. o2 sensor values are ignored in open loop mode.

 

[psychlow]

Originally posted by dave99gst
sorta true -- but knock is also a direct cause of running lean. heance o2 readings are helpfull.

Yeah, but if your O2 sensor mis-registers at WOT (a lot of people's, including mine, drop to zero at WOT), then it doesn't do much for us....

What's strange as all of ours cycle just fine during part throttle.

 

[civic619]

alright, it was on 02 sensor that was bad. I replaced it with another one and works fine now.