my 95 G.AM. is'nt flashing trouble codes , I've check for ground or going to ground problems, seem ok , swaped out ecm and cal with no change, lite is on in ignition on position and goes out when start engine then comes on will come on in few seconds and stay on. but when trying to obtain codes by normal grounding of a/b at aldl ( it's a 12 pin ) it wont flash. ( need some expertise on this one) also, yeh I know 2.3 quad (known for problems) but I like a good challenge , when at idle (somewhat smooth) and press the accel it cuts out real bad ( new plugs and coil and housing appear ok ) just noticed today the first part downside of exhaust manifold (resinator or cat con ? ) seems to glow red hot at device end going towards another device then the muffler., possible restriction , any clues would be great , I'm just a old shade tree that tries to stay current and keep my GM running smooth.
Thanks The Dog