WRX ALL Cylinders missfiring?

[Timdog1650]

Yeah, the gray wires are probably from an aftermarket BCS. I was referring to the bottom two out of four pictures...

Do you have any clue what was done to the car by the previous owner? Obviously they used wire nuts, so they likely did not have a very solid grip on in-car electrical systems.

[WRX_Fan_0717]

I don't have a resistor in my MY02, as I've removed my EGT sensor, and have no CELs. I think I turned it off in RomRaider, though



Could be OpenSource, as well, thereby no access to the ecu hardware needed

Yea my hunch was the UTEC. If you get tuned in "Speed Density" it will give you a miss fire on all 4 cylinders.

Do you have any clue what was done to the car by the previous owner? Obviously they used wire nuts, so they likely did not have a very solid grip on in-car electrical systems.

Yea no kidding.

[teflon_jones]

I'd start with either replacing that portion of the wiring harness or at least patching it back together correctly and sealing it with waterproof heat shrink. If the wiring harness is less than a couple hundred bucks, and you're reasonably experienced working on cars, then I'd just buy one and replace it and that way you can probably save yourself a lot of time and trouble.

[orion3]

Thanks for the help.

It appears the only wires that are modified are for the BCS like you suggested. It has been moved deeper in the engine bay than i have seen on stock engines. But it is still there and it is blue like the stock one. There is a vacuum hose leading away from it to the perrin turbo inlet. Do you think it was just lengthened to reach the aftermarket inlet?