need help figuring whats wrong
 

i just checked for codes and i am getting 13, 24, 31, 51. the car is idling really bad, i checked timing and its right. and i cant drive it it wont go above 2000rpm while moving, but can eventually make it that high while at a stop. its an 87 turbo 5spd. any advice willl be greatly appreciated.

Not sure about the errorr codes but it sounds like you have a massive boost leak. Check your intercooler hoses and clamps.

Could be a clogged Cat also. Mine was clogged, and I had no boost, and wouldnt go above 4500RPM.

give this link a try and it should tell you atleast a bit about the codes.

http://cygnusx1.net/Supra/TechTips/e...ror_codes.aspx

check your tps too. a mal adjusted or bad tps will give you idle problems. thats your code 51.