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SolaraGuy.com • View topic - L/T fuel trim @ 4 psi?
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L/T fuel trim @ 4 psi?

L/T fuel trim @ 4 psi?

Postby NRDriver » Fri Nov 27, 2009 7:00 pm

n/e 1 here boosted at 4 psi that know what they're average long term fuel trim is adjusted to by the ecu?
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fuel

Postby NRDriver » Thu Dec 03, 2009 12:09 am

really? no one???
come on. someone here has to know
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Postby Slut » Sat Dec 05, 2009 11:50 pm

Every vehicle is different.
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yeah

Postby NRDriver » Sun Dec 06, 2009 1:25 am

i realize that theyre probably gonna be within 10% of eachother. im just comparing to n/a vehicles.
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Postby SpeedySolara » Sun Dec 06, 2009 9:23 am

I 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.
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Postby JavaJoe_2 » Sun Dec 06, 2009 9:48 am

Because 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
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Re: L/T fuel trim @ 4 psi?

Postby NRDriver » Sat Jul 10, 2010 2:16 am

my 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%,
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Re: L/T fuel trim @ 4 psi?

Postby JavaJoe_2 » Sun Jul 18, 2010 6:15 pm

NRDriver 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?
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Re: L/T fuel trim @ 4 psi?

Postby NRDriver » Sun Jul 18, 2010 6:56 pm

unfortunately 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.
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