hey guys, i have a dilema which i cant seem to figure out, hopefully you guys can help me out. i have a 92 305 tbi. i was hooking up a 4 prong relay for the fan so the fan will engage whenever the car is on. basically to make a long story short, from the relay i had 4 lines coming out; a wire going to the frame of the car (ground), a wire going to the 12v power on the fan, a wire going to the accesory insert in my fuse box, and a wire going to the battery. from the fan i had to ground it in order to complete the relay setup. so after i installed the fan the power line coming out of the fan fell out. so i had to try to plug in the power source back into the fan, so it being dark out already i tried to feel the plug on the fan and inserted the 12v power supply not in the right spot. it turned out i plug the 12v power right next to the ground connected to the fram of the car. i hope this wasnt to confusing. in a nut shell, i hooked up the positive and negative toghether. the wires started to smoke and fry and quickly i had to disconnect the battery before something severe occured. after a total of about 15 seconds while positive and negative were connected i disconnected the battery. it didnt seem like any blew or got damaged besides for the wires. i started the car and all seemed fine, until i started driving, i noticed the idle was rougher, acceleration was also rougher. it kind of seems like the cylinders are not in sync, or maybe even not all 8 are hitting. i need to know what could have been damaged? could i maybe have burnt out a spark plug wire? what could be causing the rough idle, and the shaky acceleration. please post some advice and assistance. i hope i was clear. thanks! Dozer80464@aol.com

 

I've accidentally shorted positive to negative several times on my car; fortunately, it never caused any severe damage. Kinda scares you though, doesn't it? That loud pop and all of those sparks...

I don't see a spark plug wire burning apart by shorting out the power system, since it's only connected to a cicuit when the car is running... and 12V is not nearly enough voltage to jump the gap inside the distributor.

Did your SES light come on? If so, you might want to scan for error codes... a sensor (or two) might have blown out in the power spike. It's also possible that the ECM got hit in the surge.

 

my ses light has been going on recently during cruises. im going to scan tommorow and see what it has to say.