I have an adjustment **** in the dash of my '90 to mess with the air/fuel mixture, wired into the map sensor I believe. The guy I bought it from set it up. haha... So how do i know where is an optimum setting?

 

Did he make up any kind of gauge, mechanical or digital?

If not take it out, you could cause long term damage.

 

do a thread search, i have heard of these A/F mixture adjustents. i know nothing about them. ....hence my falling back on the thread search...

 

i would scratch it and replace MAP, you dont know how accurate that **** is, and running too lean can blow your **** up

 

I believe that 14.7/1 is the ideal mixture. I'm not sure how you achieve it with the mixture adjustment you have. Actually, that's pretty much why computer controls were developed.

 

get rid of that thing if you don't know what your doing
too lean and BOOM! no more engine...

 

X2, USE OEM STANDARDS! im in a engine mechanical theory class. Im learning alot about how the fuel/ air mix can change how your engine operates. even a couple of degrees + or - of difference due to a change in the mix could seriously damage your engine in < 36,000 miles, 90 HRS.