BLK01S4

Maybe some of you experts can fill in the blanks to help make it more complete these are little things here and there I see Mike/Doc post I write them down in my notes so when I am on the road I have a good reference guide.

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031 Oxygen Sensor Voltage
in block 031 log your wide open throttle voltages on the primary sensors and be sure it's around 0.8V+ to redline. anything higher than about 0.95volts is going richer than what i'd like to use.
Target around -7% rich.
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026 027 Knock control, knock sensor voltage (amplifier factor included)
log 026 and 027 to be sure your knock voltages are in the high teens, low 20's. knock gets saturated around 29.835. try not to hit that frequently, if you bounce off of it from time to
time, it's ok. you can either: add fuel or subtract timing to reduce your knock values. listen for any audible ping as well.

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020 Knock Sensors Cyl 1-4
021 Knock Sensors Cyl 5-8 <How many degrees is considered tolerable for 020, 021?>

115 Boost Specified / Actual

034 EGT < What temps to watch for Idle Part WOT >

032 Oxygen sensors learning values
<At what point should it be determined that adjustment is needed +/_ should you always shoot for 0? I think Mike says shoot for -7>

Anything else plz do add!

Yossarian

Some safe numbers I heard mentioned:

400 idle
600 cruising
800 WOT

sj6sp

FWIW, I see timing getting pulled a few (3) degrees when knock voltages are in the mid-upper teens.

s4what?

15 deg is max. up to 10 deg on a few cylinders is OK. I don't know why knock sensor voltage is useful (block 026 027)when 020 021 gives actual retard.

I think O2 voltage is an unreliable way to measure A/F. The sensor is VERY non-linear with an almost an on-off curve. Readings on the steep slopes either side of stochiometric is unreliable. That is why wide band sensors are used.

M3iRiSH

I don't believe everyone's fuel trim will be the same, ie not everyone can aim to be around -7%. Well maybe...I need to keep learning and toying.

Right now I'm very close to %0, but have O2's in the .85v range. Maybe I'm missing something?

I like your idea here though.

BLK01S4

Thats fine leave it there! =] Every car is different.

Milka

Great thread, how can we get some more of the guys adding to it?

M3iRiSH

I believe that's the only way you can connect is w/ the ignition on

Milka

I can only connect with the ignition off, when I turn the ignition on all settings are lost?

Interesting thing is I read the values with ignition off and set the new values ( say idle +200rpm ), if I shutdown lemmiwinks and restart it it will read the values I set. But as soon as I turn the ignition on I lose all changes?

I have a D-box ECU?

Any ideas?

M3iRiSH

Did you read, meaning hit the read button, the values after setting them?