LTrims parameter
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TECH Addict
Joined: Mar 2002
Posts: 2,189
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From: Glendale, CA
LTrims parameter Hi I just got AutoTap and don't really know what some of the parameters are and what they mean. I have an aftermarket MAF and i've heard right and left that it can be a problem so all i care about right now is checking my LTrims/tranny line pressure. Where is this parameter and what value do i want it to be at?
Re: LTrims parameter It is referred to as Long Term Fuel Trim B1 and Long Term Fuel Trim B2 on a-tap. While driving around, just glance over at the laptop and make sure that your Lterms are within +15% to -15% and you should be fine.
Once you get tuned, or want to start making changes with an MAFT, then you need to start adjusting them to be slightly below zero for best results. If your PCM is 'tuned' then they need to be slightly negative 95% percent of the time and very close to ~0% when you go WOT.
Good Luck,
Kevin
Once you get tuned, or want to start making changes with an MAFT, then you need to start adjusting them to be slightly below zero for best results. If your PCM is 'tuned' then they need to be slightly negative 95% percent of the time and very close to ~0% when you go WOT.
Good Luck,
Kevin
