Datalogged car..help me find the problem!

[the98stang]

Well guys I datalogged my car but I'm not quite sure how to read this. I wanted to check my MAF and IAC and make sure they were functioning because my cars idle is really crappy right now. I also datalogged the fuel trims and o2 sensors. You can DL the files here, but it they must be changed to .csv files. Thanks for any help or advice!


http://www.geocities.com/mo0cow2003/test1.txt
http://www.geocities.com/mo0cow2003/test2.txt
http://www.geocities.com/mo0cow2003/test3.txt

Tanner

 

[the98stang]

Here are some numbers...I'm not sure what some of them mean...

Spark: range from 14.5-19
Air charge temp: 142-144
IAT sensor: 254-257
Air intake temp:142-144
INFRD_CAT_TEMP: 878.25-879.375
ISC_DUTY_CYCLE: .363-.3828
MAF_AD_counts: 162-166
Load: .15-.157
OBDII_TEST_CMP: 16
RPM: 800
short term fuel trim: .98-1
O2_B1_FRONT_V: .066-.86
O2_B2_FRONT_V: .147-.83

What can I log to check the MAF and IAC? Sorry but I'm new to dataloging and I'm not too good with the xcal2 yet. Also, I noticed today right before it wanted to die, the lights got really dim on the instrument panel. Maybe my idle issue is related to the altenator? My battery died about 1-2 months ago,so I don't know if the alt. caused that or not. Thanks for any help guys!

 

[OV10stang]

From what you said about the alt/batt, add battery volts to the list so you can see if it's low or not.

 

[OV10stang]

Trims should be around 1 + or - a few %, data log both(2) shorts and both(2) longs.... Not sure what else you can datalog in the fuel sys with a pre-99, like pressure drop and what not, sure theres someone else here that knows more on this....