I have replaced the injectors all the vacum lines in the car but it still stalls and won't hold an idle. I have no clue what to do now.

 

what mods do you have? ecu? tbe? stock turbos? fuel pump?

 

no compleatly stock all NA stuff st 13b motor

 

Sounds like a vacuum leak. You worked the injectors and vac lines. Did you check gaskets at UIM and LIM? Is your TPS in working order and set correctly?

 

I bought a whole new gasket kit for the car, I new at this what is a TPS?

 

Sorry I'm reatarted, how do I check the throttle positioning sensor

 

Your car is a 1991, that's considered a Series 5 FC. In the Frequently asked questions section of the 2nd Generation forum, there is an on-line factory service manual. Look in the Fuel section and there will be a description of how to check and set the TPS. There are 2 or 3 ways to do this and they have been frequently discussed in the 2nd gen forum. run a search on TPS and you will find a bunch of good information. In my experience I have found that the most reliable way is to disconnect the TPS connector and check the resistance with the motor off. Get it set to approx 1000 ohms and then set the idle. If you find that the car is still having problems, you've at least eliminated the TPS a possible culprit.