Help please
im 17 and i baught a 78 corolla, ive had since i was 16 but now its developin some problems extremely hard to start when startin until warm it miss fires and back fires consantly i have put new plugs new leads tried a new coil nothing sems to work please help im startin to get frustrated
also if i was to put a new engine in it wat engines can i put in like straight in no hardcore coversions

could be lack of fuel ie blocked filter etc or incorrect ignition timing

Have you tried a new condensor?
New points?
Checked the timing?
what about ballist resistor?
Points gap?
Sparkplug gaps?

Mine has a 12volt system reduced to 6volts after start, but had been modded to just 12volts without the previous owner telling me... it took about 2months to track down the problem