Very Strange Data Logging Results

[jumpman]

Hi people.

It's been a while since I've visited but I've got a wierd problem with my car that I can't quite diagnose. Recently I've been running super rich and had a massive boost leak coming from my BOV (the 1G BOV adaptor kept slipping out of the stock 2G IC pipe). I fixed the latter problem with new IC piping from Dejon Tools but the fuel problem is still there. As a matter of fact the last code I threw was a P0170 which is a fuel trim problem and a couple of days ago I threw a P0300 code which is random misfire. So I cleared the error codes with my pocket logger and did a couple of test runs with the logger on and the results totally confused me.

At idle I have these numbers

Calculated Load of 17%

Short Term Fuel trim of 17%

Long Term Fuel Trim of 12%

Throttle Position of 1%

O2 Bank 1 Stuck at 0.00 Volts
O2 Bank 2 Stuck at 0.74 Volts

At WOT I have these numbers

Calculated Load of 95%

Short Term Fuel Trim = 0~6% (0 on flat ground 6 on slight incline)

Long Term Fuel Trim = 8%

Throttle Posisiton of 75%

O2 Bank 1 at 0.16 Volts (Sometimes doesn't even move)
O2 Bank 2 at 0.94 Volts

To say the least I think there is something very wrong with my fuel handling system but it may be something else that I can't think of.

Any help would be appreciated.

CMF

 

[ninety7gst]

its a bad front o2 sensor, almost guaranteed...get a denso.. there about 15$ more than an oem one and they are more durable... machv.com is a good source...

 

[krazywhitboy]

its a bad front o2 sensor, almost guaranteed...get a denso.. there about 15$ more than an oem one and they are more durable... machv.com is a good source...

i agree.....

 

[jumpman]

I guess I should have posted the the results on that one.

I finally broke down and sent it to the dealer. My front O2 was toast and my rear O2 connection was loose. On top of that my fuel pressure solenoid was disconnected somehow. I suspect a dealer that I used to take the car to (and that I no longer trust by the way) did that to keep me coming back.

But now that that is fixed I have no problems. Other than a little case of overboost. I recently installed a Dephi Boost guage and found I was getting 15lbs solid and with spikes of up to 19lbs on my little T25. So my next purchase (other than some new rotors to replace the sorry set I have now) is a hallman boost controller to turn it down to something more sane like 12lbs.

I'll keep you guys posted on how everything goes.

CMF