Electrical Problem? Or maybe Engine Problem?

OK so my Toyota Levin is a 4A-GE Silvertop, I have been having problems when the car is at idle, the engine light starts to blink and the car just feels like its about to turn off, after about 3-4 minutes it goes away if I keep my foot on the accelerator, if I dont press the accelerator down abit then the engine cuts out.
I also had to get a new Igniter Pack because the last one didn't provide spark to the main distributor lead, I put the new one in and drove down the road then the engine just cuts out, I checked for spark through the main distributor lead and no spark again, I do not know why it cuts out or how the car plays up on idle? Any suggestion will be much appreciated !