hey all, have been having some troubles with our 83
turbo zx. i'll try to detail the symptoms as best i can. a few weeks back began running poorly. temps in low 90's with hi humitidy. pulls decently to around 3000rpm then begins to falter-like short on fuel. also anything past ~3/4 throttle and she falls on her face [actually feels like someone turned off the key]. i changed the fuel filter, problem gone...temporarily but so was heat wave-temps back to low 80's. back to heat wave problem back. got so bad that it wouldn't do much more than idle. change to a spare ign coil i had. again, problem solved...temporarily. also, during all above instances, sometimes under acceleration i'd hear a popping under the hood-very similar to backfiring through a carburator. seems to run better when the engine is slightly warmed up...worse when fully warmed up. i checked all the electrical connections that i could get to but don't know what to do next...
help!