Ok i crank the car and it runs fine(until i start driving)but anyway when i shut my car door hard the tachometer goes down and my subs make a loud BOOOMM sound thats constant until i open the door again!also all the lights get dim too!! could this also cause my engine to bog in low RPM's???im desperate,lol

p.s. i have a 2000 civic ex greddy turbo kit with emanage

 

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