Hey guys,
I have been searching the forum and can't find my answer.
What should my long term fuel trims look like with 550 injectors and a rectronix stage 2 chip?
Currently they're all around +12%. At the time i thought this was just due to the 550s. But I noticed a hesitation after shifting during heavy throttle maneuvers and now think there might some unmetered air (ie leak pre turbo) getting in, that or my BPV is leaking.
Thanks!
Fuel Trims with 550 inject and a revtronix stage 2
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Fuel Trims with 550 inject and a revtronix stage 2
91 Legacy SS
Re: Fuel Trims with 550 inject and a revtronix stage 2
Now that i think about it....+15% doesnt make sense for larger injectors. -15% would....
91 Legacy SS
Re: Fuel Trims with 550 inject and a revtronix stage 2
Is the stage 2 chip supposed to use the 550's?
What are your AFR's like?
What are your AFR's like?
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
Re: Fuel Trims with 550 inject and a revtronix stage 2
I believe that the stage 2 is suppose to use 550s..
I dont have a wide band so i cannot share AFRs. Though if i did I would much rather give it to you in equivalence ratio
I dont have a wide band so i cannot share AFRs. Though if i did I would much rather give it to you in equivalence ratio
91 Legacy SS
Re: Fuel Trims with 550 inject and a revtronix stage 2
Stage 2 chips could use 440cc, 550cc, or whatever the original owner specified in the order. Assuming 550cc is a bad idea (for example I got mine with 440cc). There is no way to check what it was tuned for either. There is no way to check what revision of a chip you have.
Scan through http://bbs.legacycentral.org/viewtopic.php?f=19&t=43958. The Stage2 v3 chip increased the fuel trim learning limits. I forget what % they max out on without that feature, but I think it was +14.8/-25%. The closer the trims are to 0%, that means the ECU is closer to the tuned specs for the specified injector flow rate. The further the numbers increase/decrease, means the ECU has had to learn and compensate.
Scan through http://bbs.legacycentral.org/viewtopic.php?f=19&t=43958. The Stage2 v3 chip increased the fuel trim learning limits. I forget what % they max out on without that feature, but I think it was +14.8/-25%. The closer the trims are to 0%, that means the ECU is closer to the tuned specs for the specified injector flow rate. The further the numbers increase/decrease, means the ECU has had to learn and compensate.
'11 WRX Limited
'94 SS | 3" TBE, 07 TMIC, TD05H-16G, Revtronix Stage 2, Walbro -- Sold
'94 TW | R.I.P.
Re: Fuel Trims with 550 inject and a revtronix stage 2
Did you use the wrong MAF?
Re: Fuel Trims with 550 inject and a revtronix stage 2
I must have been sleep deprived when i read those fuel trim numbers because they are only 3%. I confirmed my chip is for the 550s and I am running JECS MAF..
I did set a 49 MAF code but i am not sure how. I cleared it and it hasn't came back (which is scary because i know it will at the worst time possible).
I did set a 49 MAF code but i am not sure how. I cleared it and it hasn't came back (which is scary because i know it will at the worst time possible).
91 Legacy SS