i just traded for a 1990 gt. car required a healthy dose of ether to start initially. once started it would not idle until i turned the idle screw a bit but still ran rough. as it warmed up it seemed to run a bit better but was still very rough and missing quite a bit. although it has moments of wanting to come alive and run. it almost acts like it has bad gas in it, but i dont smell the normal bad gas odor. once warmed up i drove it the 7 miles to my house and even played around a bit and even did a small burnout on the highway in front of my house. turned it off and restarted it 4 or 5 times while warm without any starting problem, although it continued to have a rough idle and an intermittent miss. the following day i decided to check into it a bit more and started by trying to start it. i could only get it to hit here and there without it ever starting even with ether. the cap and rotor are worn but nothing that should cause this problem, the yellow coil appears to be aftermarket but has been in the car awhile. removed the #5 spark plug to find the plug itself covered in a light black layer. with exception of the electrode having a dull shiney spot. the plug did smell like fresh gas. the only mods that it appears to have are an open air filter, headers, no cats, dual flowmasters and h-pipe. i do realize that i still have a few troubleshooting steps to finish, but i thought id throw this out and see what opinions i could get from those with more experience on these cars than me.