L/T fuel trim @ 4 psi?
Posted: Fri Nov 27, 2009 7:00 pmn/e 1 here boosted at 4 psi that know what they're average long term fuel trim is adjusted to by the ecu?
really? no one???
come on. someone here has to know
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Posted: Fri Nov 27, 2009 7:00 pmfuel
Posted: Thu Dec 03, 2009 12:09 amPosted: Sat Dec 05, 2009 11:50 pmEvery vehicle is different.
yeah
Posted: Sun Dec 06, 2009 1:25 ami realize that theyre probably gonna be within 10% of eachother. im just comparing to n/a vehicles.
Posted: Sun Dec 06, 2009 9:23 amI would do at best 325mi to the tank when n/a. At 4 psi I would do around 300mi or so. At 6 psi I'm doing around 290mi. to the tank.
Posted: Sun Dec 06, 2009 9:48 amBecause the long-term fuel trim is slow to respond, you will not be able to get
both the short term and long term fuel time to zero during your tuning session.
Your objective should be to have short term and long-term values that are equal
magnitude with opposite sign. For example, trim values of +10% and –10% will
average close to zero after several drive cycles and over 100 miles of driving.
http://www.gadgetonline.com/U-Tune.pdf
Re: L/T fuel trim @ 4 psi?
Posted: Sat Jul 10, 2010 2:16 ammy car is naturally aspirated. im a mechanic so i have constant access to a modus. for the last year my car has always been at +36 to 39 l/t fuel trim. this is high as hell for a naturally aspirated vehicle. got forbid i put a supercharger on there. the computer wouldnt even be able to compensate at 4 psi. this is why i ask. even when i deadhead the battery, it always starts out at +16%,
Re: L/T fuel trim @ 4 psi?
Posted: Sun Jul 18, 2010 6:15 pmNRDriver wrote:always been at +36 to 39 l/t fuel trim. this is high as hell for a naturally aspirated vehicle. got forbid i put a supercharger on there. the computer wouldnt even be able to compensate at 4 psi. this is why i ask. even when i deadhead the battery, it always starts out at +16%,
But, your mods listed would have changed the settings for the ecu. This is why fuel mods are highly recommended for forced induction. What kind of difference did the "chip" have before/after? Did you check settings before/after you did the mods to determine which ones may have made the difference?
Re: L/T fuel trim @ 4 psi?
Posted: Sun Jul 18, 2010 6:56 pmunfortunately when i bought the car it already had the hks ignition and jet chip. the does have some balls compared to other 1mz camrys ive drivven though.