ATAP newbie bugging you with more questions
12-19-2001, 04:50 PM
#1
ATAP newbie bugging you with more questions Okay, help me figure out my a/f ratio. I was setting up my parameters and did not see "a/f ratio" in any catagory. I can pull up the graph, but the # on it are like 0.365. Not #'s I know such as 13.0. Help me. One more: My oil pressure reads -14.0%. What's up with that? BTW, I'm running the DOS version.
12-19-2001, 05:05 PM
#2
Re: ATAP newbie bugging you with more questions The A/F ratios can be figured by reading the O2 sensors (B1S1 and B2S1). They give their readings in mvs. Ideal readings are .880-.900 at WOT. I'm sure there is a conversion out there if you want to convert to whatever you want it to read (13:1, whatever)
Dope
Dope
12-19-2001, 05:27 PM
#3
Re: ATAP newbie bugging you with more questions Okay, I see. On the graph it shows my O2 sensor readings for both banks are from 0.365 to 0.385. I have no idea what rpm that was for. I'll put it in my parameter setting and see what it looks like. Anyone else?
12-19-2001, 07:51 PM
#4
Re: ATAP newbie bugging you with more questions Well, I went on a test run. At wot my O2 readings were around .870-.885 so I guess that's good. I would like to know how to convert it to a # like 13.5 or something. And, still, my oil pressure does not move from -14%. I don't know what to make of that.
12-19-2001, 09:36 PM
#5
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Re: ATAP newbie bugging you with more questions I would say that its not reading the oil pressure if it doesn't change. You'll notice that not every thing you have the option of monitoring will actually record any data.
Another tip.
The unit has a finite amount of data it can measure per unit time. The more variables you sample...the more time between measurements on any givin sensor sample.
Example: Measure just rpm, and nothing else...you'll notice it samples the rpms very tightly.
Now add the long/short term fuel trims, all the o2 sensors, the knock sensor, and timing, throttle position, the MAF load out. and make a run. Now notice how much seperation there is in your RPM samples.
In other words.... its best to target what your looking for.
Another tip.
The unit has a finite amount of data it can measure per unit time. The more variables you sample...the more time between measurements on any givin sensor sample.
Example: Measure just rpm, and nothing else...you'll notice it samples the rpms very tightly.
Now add the long/short term fuel trims, all the o2 sensors, the knock sensor, and timing, throttle position, the MAF load out. and make a run. Now notice how much seperation there is in your RPM samples.
In other words.... its best to target what your looking for.
12-20-2001, 07:47 AM
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Re: ATAP newbie bugging you with more questions Unfortunately, it won't monitor oil pressure. Mine always comes up -14, or 14 or similar when I checked it.
Also, make sure you are monitoring the B1S1 & B2S1 O2's @ WOT, those are the pre-cat O2s.
Also, make sure you are monitoring the B1S1 & B2S1 O2's @ WOT, those are the pre-cat O2s.