http://www.240sx.org/faq/index.html
Off the 240SX.Org website. Click on the FAQ button...the above link should already put you there though.
Once the page loads, look to the links on the left. Scroll down till you get to ECM...Reading Trouble Codes...DOHC
It should tell you how to put your ECU into Diagnostic Mode. If you still have any questions, then download a S13 FSM from here....
http://www.ffdet.com/members/rich/Nissan/nissan.htm
It will be the links on your right side...S13 KA24DE Manual....click & download.
All this info should get you going in the right direction. Hopefully it will help you solve your Bogging problem...
Anyhow...hope all this helps....Good luck!!!
ID
'95 SE