E36 no power when warm

[NoGoe36]

Hello. Read hundreds of posts about similar problem but can't find answer.
Bought this E36 323i like month ago. There was a big oil leak in valve cover so oil was going in two spark plugs. Fixed that. One day engine was running and then suddenly stalls. Diagnostic said there is problem with crank sensor so I changed that. Car was running fine for about 30mil and the started to loose power up to 3k rpm so now when car is cold it's running perfect when temperature goes above blue it's starts to loose power. The feeling is like there is not enough fuel or all sparkplugs is not working. Have changed air mass sensor and cam sensor still same thing.
Maybe someone can help me find answer.

[MarcoZandrini]

I’d check the fuel pressure first. BMW fuel pumps seem to last about 5000 hours. There should be a test valve on the fuel rail. The pressure needs to be at least 50psi at all engine speeds.

[NoGoe36]

Could it be like when the fuel pump warms up it starts to work bad?

[Breeze1]

Could it be like when the fuel pump warms up it starts to work bad?

Could be that yeah. Anyway you should follow the procedure given by Marcozandrini to make sure. Or if you don't want to and have access to a used pump (scrapyard or else), you could swap it with yours and see how it goes. If it doesn't fix the issue you put yours back in and save your money.
Also, have you replaced the fuel filter?

[bmwdirtracer]

Why did you change the cam sensor and the MAF ? Did you have codes that said they were bad?

I highly recommend that you start by reading the codes with a good BMW specific scan tool. Don't throw parts until you know what parts to throw.

While you're looking at the codes with that BMW diagnostic tool, have a careful look at the engine coolant temp sensor's live data, and that for intake air temp. See whether these two values correspond with reality.

If the computer is seeing coolant temp or intake air temp of -40 degrees (an open circuit), the engine will run like crap as soon as it's warm.