My 1994 Saturn SL died completely when driving on the interstate due to a clogged catalytic converter (after many hours of diagnosing everything else). I have replaced fuel pump pressure regulator injector and filter. car will start but idles rough below 500rpms and dies shortly after, if i can keep it running it stumbles when it hits 1500rpm. i have checked spark and fuel pressure(which after replacing everything but the lines it should and is perfect). I am hearing a vacuum leak (replaced the main known issues intake and throttle body (tbi) gaskets). still hear it and cannot find it. i am wondering if i have misplaced vacuum lines or am overlooking something. i did do the home smoke test which is blow cigar smoke into vacuum lines and see if smoke comes out.....it came out of the butterfly valve. i took off the throttle body again and noticed the iac is completely retracted. is this normal for cold starts?
Sep 6, 2013 at 5:03 PM
