i have an 89 firebird with a 2.8 tune port. i have been having problems with the tps. cant get it to adjust right and now my idle drops to 3 or 4 hundred rpms at a stop. the car all so was stinking really bad so i to off the cat thinking it was clogged. i knocked that **** out of it the car runs a little better. it does stink anymore but i am still have the idle problem. the code aare saying maf which i just changed like 6 months ago so i just cleaned it it is also say ith air temp senser on the manifold but i change that to. i am out of ideas some one please help