Issue with bogging/ hesitation

[jbellingham]

I’ve been having an issue lately where I’ve got slight bogging/ sluggish acceleration when the engine is cold.   Clutch is not slipping.  Engine is not misfiring.   The issue goes away once engine starts warming up.  
 

so far I’ve:

- changed fuel filter

- changed O2 sensor

- checked vacuum lines

- changed plugs and wires

 

any suggestions would be appreciated!

[MiNi Beast]

You check for exhaust leaks? 

Hows trans fluid? Mines little heavy and thick until warms up a bit.. 

[Pete M]

testing procedures for various sensors are in the link in my signature

[cruiser54]

What year is it?