Problem with fuel system, need help!

[Obuolinis]

Hello, i have e30 coupe m20b20 1985 older model and i have problem with power losing when i turning left or right and my high presure fuel pump works very loud. I cleaned my fuel tank, changed fuel pump in the tank and outside, changed fuel filter and preasure regulator, where is the problem, any ideas? i dont know what to do, fuel tank is full

[HartgeH27]

I would await a diagnosis from Brianmoore, I have my own thoughts but would appreciate his first.

[Obuolinis]

HArtgeh27 tell me, what do you think, where is the problem?

[Mahmutarilas]

Check your fuel return pipes,not sure if you fuel tank same as mine,but in my one i got fuel return filter inside tank ,that was blocked so was having lots of issues.
Remove the fuel pump inside the tank,then remove fuel return hose from fuel regulator and just give it a blow,you should be easily heard fuel bubbling inside the tank and it's should be easy to blow

[Mahmutarilas]

Check your fuel return pipes,not sure if you fuel tank same as mine,but in my one i got fuel return filter inside tank ,that was blocked so was having lots of issues.
Remove the fuel pump inside the tank,then remove fuel return hose from fuel regulator and just give it a blow,you should be easily heard fuel bubbling inside the tank and it's should be easy to blow