Loss speed when runig at20mil will try to stadel and not picking up speed on a 93 xj6 was runin fine dont now wats the problem?

Probably a miss fire,,, fuel or ignition related. or worse valve train problem

duplicate question

Its possible. May be coil pack too.

CHEAP BUY FOR THE BODY$500.00.GOING COST $2000.00 FIX ENGINE.IF YOU HAVE LOW COMPRESSION. ENGINE WORN OUT.

clogged fuel filter on faulty fuel pump replace fuel filter and recheck

The best thing to do is have auto zone check your codes for free and that would be a place to start from.

bmw 316i coupe i was driving and my car loss power... Answer Failed: retry i was driving and my car loss power not picking up speed like it should

are you sure those intakes are inter changeable?
if you still have the 98 intake and your 93 block ,sit there and look for any differences in holes or hole locations.
another way to check is when it is running remove the oil fill cap and see if it stalls or picks up speed.

have you changed the fuel filter lately a plugged fuel filter will cause this concern
did the power loss start all of a sudden or did you start losing power over time ?

Yes it could be the mass airflow sensor, it could also be an O2 sensor, or the EGR valve.