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06-19-2020, 06:00 PM | #1 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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Dead ecu after welding on header
2005 Forester XT MT
I had a muffler shop cutting out flex pipes on my header. When I get the car back it has a p0032 code after clearing and even if o2 is unplugged. So how do I figure out if it’s the sensor or ecu. I lean towards ecu, I’ll go into romraider and check the o2 data, try a reflash and delete the p0032 so I at least get my boost control back. I’m running openloop all the time showing 13.4:1 off boost, so no danger as of yet.
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06-19-2020, 06:30 PM | #2 |
NASIOC Storefront Vendor
Member#: 384404
Join Date: Mar 2014
Chapter/Region:
SCIC
Location: Buena Park
Vehicle:MANY WRX, STI, 997TT wrb |
is the car able to start/run at all?
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06-19-2020, 07:21 PM | #3 |
Scooby Specialist
Member#: 182415
Join Date: Jun 2008
Chapter/Region:
Tri-State
Location: New York
Vehicle:1999 RS Aspen White |
Its not the ECU, they probably damaged the sensor or the wiring for the sensor. Ive done weld repairs on multiple dozens of cars and have never ever had a single electrical issue with one.
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06-19-2020, 07:41 PM | #4 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
uhh so you are going to turn off the monitor so you can get boost control back? kinda dangerous dont you think?
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06-19-2020, 08:43 PM | #5 |
Scooby Guru
Member#: 6971
Join Date: May 2001
Chapter/Region:
NWIC
Location: Edmonds, Washington, USA
Vehicle:2008 WRX STi SSM |
my money would be on the o2 sensor.
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06-19-2020, 08:53 PM | #6 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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I’ll start with o2, nothing wrong with a fresh o2 sensor either way. The cell is on but it hasn’t disabled the boost controller. In boost is the only place it’s acting normal. Only thing it’s doing is running a point rich where it would normally be in CL.
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06-20-2020, 11:37 PM | #7 |
Scooby Newbie
Member#: 515773
Join Date: Jun 2020
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did you have a proper ground when you were welding?
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06-21-2020, 12:11 AM | #8 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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Muffler shop welded it
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06-25-2020, 02:23 PM | #9 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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New sensor came in, no change. I have a legacy ecu enroute I’m pretty sure I can drop my rom onto
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07-11-2020, 12:01 AM | #10 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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Ended up using an 05 Auto ecu with my mt rom flashed on there and I moved the lr5 immobilizer chip from old to new ecu with a hot air soldering iron, works great
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07-11-2020, 12:02 AM | #11 |
Scooby Specialist
Member#: 515308
Join Date: Jun 2020
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Also the sensor wires were bare from welding of him not unplugging it and letting wires spin while removing the o2, so ecu was prob damaged from heater wires touching.
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