alright i got my moms car. the engine light comes on once and awhile. then once in awhile while its on itll blink and ill lose a shitload of power. i got hte code checked it was cylinder 4. i replaced the sparkplug. the old one had some carbon on it. not a shitload but a good amount. the engine has 70k miles. after i replaced hte sparkplug it didnt fix the problem. any other suggestions???

 

Injector

 

change all the plugs and all the plug wires--then see what it does

 

Wires...those damn thing crystalize