Fuel Cell 13 = 100% TPA?
09-27-2002, 07:20 AM
#1
Fuel Cell 13 = 100% TPA? I made a couple of logs while coming in to work this morning. I noticed something very strange ... when separating the WOT runs from the logs, I noticed (by sorting the info by TPA) that at 100% Throttle the Fuel Trim was at 13? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> But 13 is a part throttle feul trim correct? Why is it showing up at WOT? And no I did not let off of it, this was a 30-45 second WOT run. This could through off all my averages for LTFT I have made and WOT tuning. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
09-27-2002, 07:28 AM
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Re: Fuel Cell 13 = 100% TPA? Was it a large number of entries of 100% tps with trim 13? If it's just a couple, maybe you just caught it transitioning through to 15 or 22. I'd guess if you were logging a lot of params then that would slow it down enough to cause it more.
09-27-2002, 09:45 AM
#3
Re: Fuel Cell 13 = 100% TPA? It was a long WOT run. As the percentage went up (from ~95%-99%) the fuel trims were at 22, but once the throttle was wide open (100%) the fuel trims dropped to 13. After the WOT run, I started to let off slowly, and you can see in the log that the fuel trim cell went back up to 22 and then dropped to part throttle (after TPA was ~90%). <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> I was only logging LTFT and O2 Voltages (B1S1 & B2S1), RPM, TPA and Fuel Trim Cell. It was not in transition from/to.
09-27-2002, 03:41 PM
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Re: Fuel Cell 13 = 100% TPA? fuel trims or fuel cells??
you want either fuel cell 15 or 22 at WOT..
fuel trims are what fuel the PCM is either adding (+ LTrims) or taking away (- LTrims.
you want either fuel cell 15 or 22 at WOT..
fuel trims are what fuel the PCM is either adding (+ LTrims) or taking away (- LTrims.
09-27-2002, 07:15 PM
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Re: Fuel Cell 13 = 100% TPA? If you're saying that the LTerms were at +13 at WOT, that indicates the PCM is adjusting for a lean condition.
09-27-2002, 07:33 PM
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Re: Fuel Cell 13 = 100% TPA? Duh. I assumed you meant fuel trim cell. If it was LTerm(LTFT) then 13 isn't wrong.
