I have a 1990 fc3s non turbo and the previous owners did some shady aftermarket work and I'm having problems idling... problems as in it won't idle... runs great when I'm on it just no idle

 

adjust the idle screw on the throttle body so it does idle?

 

I adjusted the screw all the way in and it made no difference then I screwed it all the way out damn near and it still made no difference.... there is a oil injector delete kit on it causing me to mix oil with fuel to be able to run the vehicle but there is also a lot of hoses missing and when I plug those I tries a little harder to idle but my main curiosity is if it's the mixture of fuel we have

 

You're adjusting the screw on the throttle body linkage?

All unused vacuum ports on the intake manifold should be capped. You can search for "emissions delete" threads to see what to do for simplified vacuum hoses.

I only have 4 vacuum hoses on my car and it idles fine...

 

Also for premixing you should use about 1 ounce of 2 stroke oil per gallon of gas

 

ya I was adjusting the right one but it made no difference for some reason... I'm glad you said what you did about the vacuum lines because that was one of my main concerns and thanks for the tip on what to search

 

ok thank you that's good to know

 

With a 1990 I am hoping that your OMP is still connected to your electrical harness.