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Nope, didn’t change diff fluid.

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Is is the proper plug for my car, it has supercharger and whole list of other modifications, basically it’s race car.
Just wondering how race plugs are different, their spark is less hot vs traditional spark plug, etc?

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Is is the proper plug for my car, it has supercharger and whole list of other modifications, basically it’s race car.
Just wondering how race plugs are different, their spark is less hot vs traditional spark plug, etc?

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How old is your gas cap, how is the gasket on it-is it cracked, torn, missing?

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How old is your gas cap, how is the gasket on it-is it cracked, torn, missing?

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I simply turned on shop vac and it blew air through exhaust. I could tell a leak with my hand, there was so much air bypassing around 02 sensor bung. It’s probably toyota factory defect with those bungs and it’s first thing I’d check, as well as other connections.

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I simply turned on shop vac and it blew air through exhaust. I could tell a leak with my hand, there was so much air bypassing around 02 sensor bung. It’s probably toyota factory defect with those bungs and it’s first thing I’d check, as well as other connections.

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To test for exhaust leaks I’ve used shop vac that I hooked up exhaust side of it to the muffler and duct taped it so it wouldn’t leak. Shop vac hose slipped right over muffler outlet and I just had to duct tape it. I’ve used soapy water around all the possible areas of leaks. It worked real well.

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To test for exhaust leaks I’ve used shop vac that I hooked up exhaust side of it to the muffler and duct taped it so it wouldn’t leak. Shop vac hose slipped right over muffler outlet and I just had to duct tape it. I’ve used soapy water around all the possible areas of leaks. It worked real well.

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Downstream o2 sensor is same for Cali and non-cali emission car.
Did you use Denso brand 02 sensor?
What I did is I cleaned oem cat that was on the car in detergent for 2 days. I blew out any debri/water from it and I’ve reinstalled it with new Fel Pro gaskets(make sure you use correct gasket or you might have exhaust leaks) and I’ve replaced DOWNSTREAM o2 sensor with Denso sensor.
There was a LEAK around o2 sensor bung where it’s welded onto exhaust pipe. I’ve welded that leak and made sure there were no leaks. There is NO more CEL on.

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Downstream o2 sensor is same for Cali and non-cali emission car.
Did you use Denso brand 02 sensor?
What I did is I cleaned oem cat that was on the car in detergent for 2 days. I blew out any debri/water from it and I’ve reinstalled it with new Fel Pro gaskets(make sure you use correct gasket or you might have exhaust leaks) and I’ve replaced DOWNSTREAM o2 sensor with Denso sensor.
There was a LEAK around o2 sensor bung where it’s welded onto exhaust pipe. I’ve welded that leak and made sure there were no leaks. There is NO more CEL on.

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Weird thing but I’ve swapped coils between cylinder 1 and 2 and reset CEL and then I turned on engine to see if CEL would come back. Car idled rough for 1/2 a minute or so and then started running great again!
I went to gas station and topped off tank (2.3 gallons) and its been running great on way back from gas station.

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Weird thing but I’ve swapped coils between cylinder 1 and 2 and reset CEL and then I turned on engine to see if CEL would come back. Car idled rough for 1/2 a minute or so and then started running great again!
I went to gas station and topped off tank (2.3 gallons) and its been running great on way back from gas station.

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I’ll try swapping coil to another cylinder and see if CEL changes to that cylinder. It’s just a pita to change these on this 05 Subaru GT, they are made for midget hands.

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I’ll try swapping coil to another cylinder and see if CEL changes to that cylinder. It’s just a pita to change these on this 05 Subaru GT, they are made for midget hands.

[Author]

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