chevy z28

I think my car seems sluggish particularly at WOT, idk, my 0-60 seems off, I was wondering if any of these datalogs can get me any advice. Thanks

https://www.mediafire.com/?7un9ol4dou19l0z
https://www.mediafire.com/?7un9ol4dou19l0z

Injuneer

Why two files with the same designation? Trying to download the second one eventually worked (and proved to be the same file), but netted a video and some other crap that was not wanted.

I have limited access to Datamaster at this time. If you can export the file in .csv format it makes it easy for anyone to view it in Excel. This is my preferred setup for a .csv export:

Record# (inserted automatically)
TimeStamp (inserted automatically)
1 – Runtime
2 – RPM
3 – Speed
4 – TPS Volts
5 – TPS %
6 – MAP
7 – Cool Temp
8 – IA Temp
9 – Ign Volts
10 – IAC Pos
11 – AFGS (MAF cars only)
12 – Spark Advance
13 – Spark Retard
14 – Knock Count
15 – Inj BPW Left
16 – Inj BPW Right
17 – Fuel Trim Cell
18 – Left O2 mV
19 – Right O2 mV
20 – LTerm-LC
21 – LTerm-RC
22 – STerm-LC
23 – STerm-RC
24 – CCP DC
25 – EGR DC
26 – Baro
27 – IAC Pos
28 – Idle RPM
29 – Inj DC Left
30 – Inj DC Right
31 – RPM-16
32 – <OFF>

And don’t forget to enter the last record number of the file in the “Count” field.

DirtyDaveW

Just down loaded it and looked at it. Your left and right O2s appear to be low/lean. When in closed loop and averaged, the result should be something like 480 if memory serves. Yours are like 366. Also, I can't remember with clarity but I thought my MAF readings at idle were in the 12 grams area. Yours are around 8. Have you put on an aftermarket MAF or altered it in anyway? Any other recent changes you've made?
BTW - No knock retard at WOT so that's not an issue. Duty cycle on the injectors reached 80% and no further so thats good too.
Dave

Injuneer

The average O2 sensor reading in closed loop should be 450mV. That's the bias voltage supplied by the PCM.

6 - 10 Grams/Sec MAF at idle is normal. My 94 (when closer to stock) routinely showed 6.xx G/S at 800 RPM idle.

DirtyDaveW

Ah.. Thanks Injuneer

chevy z28

Sorry I disappeared, uust dealing with an important loss. I didnt know I uploaded the same file. I relaced one of the o2 sensors before winter I believe pass side.

chevy z28

https://www.mediafire.com/?9car9z0r6tj9plj