[bazar01]

That's going to be tough to diagnose in the absence of the Bosch tool.

I would check for proper fuel pressure first at the rail to make sure the FPR is good. Do a visual on the FPR vac line for presence of fuel.
Check the AFM connector and make sure it's firmly seated with the clip. Do you really have a MAF instead of AFM?
Do a resistance test on the new CHT both cold and warm and compare with specs.
Backprobe the O2 sensor while engine running at idle and note DC millivolt reading .

Also test the ignition system. If you have a timing light, you can use that to check that both circuits are putting out consistent sparks.
Maybe you have inconsistent spark causing too much unburned gas in the exhaust.

Good luck.