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10-24-2020, 06:14 PM | #1 |
Scooby Newbie
Member#: 503820
Join Date: Jul 2019
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Air/Fuel Ratio
Left with no ideas on this one. Just put built motor and heads in a 2011 Wrx. After putting motor back in start the car ran fine for five minutes. Took it for a drive and at every stop it stalls. Check AP and the air/fuel is stuck at zero. Checked wires going to mass air flow all is good.
So the car runs at zero no matter where engine rpm’s are. I’m stuck in this one any help would be appreciated!
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10-24-2020, 07:56 PM | #2 |
Scooby Guru
Member#: 79643
Join Date: Jan 2005
Chapter/Region:
NESIC
Location: The internet
Vehicle:2021 STI TE Terminal black pearl |
Your MAF doesn't measure your air fuel ratio.
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10-24-2020, 08:27 PM | #3 |
Scooby Newbie
Member#: 503820
Join Date: Jul 2019
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Sorry arf learn 1 is at zero and will stall out if you come to a stop. I got it to move to 3.9 when cruising but drop to zero at stop and kills motor.
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10-24-2020, 11:02 PM | #4 |
Scooby Newbie
Member#: 503820
Join Date: Jul 2019
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Anyone have an idea?
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10-25-2020, 02:24 AM | #5 |
Scooby Specialist
Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:2005 EVO VIII open source tuning subaru |
You maf sensor measures air mass, the ecu then uses the measurement to calculate how much fuel to inject per given load/rpm cell in the fuel map. So if there are any issues with the maf then it will directly affect the air/fuel ratio.
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10-25-2020, 02:25 AM | #6 |
Scooby Specialist
Member#: 191967
Join Date: Oct 2008
Location: Vancouver
Vehicle:2005 EVO VIII open source tuning subaru |
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10-25-2020, 05:20 PM | #7 |
Scooby Newbie
Member#: 503820
Join Date: Jul 2019
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I do have a wideband and numbers are normal. I just ran the car for a bit and moved idle up a bit. It no runs fine and will idle at stops.
I believe you were right with it not being in closed loop. After driving for a bit it is fine. |
10-27-2020, 10:38 AM | #8 | ||
Scooby Guru
Member#: 79643
Join Date: Jan 2005
Chapter/Region:
NESIC
Location: The internet
Vehicle:2021 STI TE Terminal black pearl |
Quote:
Quote:
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10-30-2020, 07:05 PM | #9 |
Scooby Newbie
Member#: 503820
Join Date: Jul 2019
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It read air/fuel learning one witch is what I’m talking about.
All fixed anyway |
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