ECU, Wiring, Sensors
By Tomej2wo
#329070 So I checked the ecu today and got the code 43 which as the title says is fuel supply system. So what exactly should I get changed ..

Fuel filter?
Lambda O2 sensor? I do have a aftermarket manifold if that makes a difference.

The engine man agent light only comes on every now and then, more when it's cold.

I could replace parts off my other ej2 and see if that made a difference or would people recommend buying new? Thanks
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By asianrob
#329095 maybe change the fuel pressre regulator?

when they made that code, they made it really vague in the description lol.

maybe even try replacing your fuel cap.