ok i have an 87 s4 NA and ive been having some problems .my car messed up a while back and today i tried finding out why.....

i found that my main fuse had burnt out...no my car runs good but the things is is that when i turn the car off it takes a few seconds for it to actually turn off...i have no clue why but yeah thats the problem..i dont wanna start driving the car until it runs better and i have no problems so im asking anyone and everyone to please help me out with some ideas on what this can be...

thanks

 

Usually if the engine keeps running after the key is put to OFF, it's because someone has gotten the two wires on the back of the alternator crossed up and those wires are backfeeding the ignition circuit.

So start the engine and warm it up. Then after it's warmed up, put the key to OFF. I assume it's still running, so now go pull the small, two wire plug off the back of the alternator and see if the engine now dies. Then write back as to what happened and maybe someone can give you a clue.

 

Many times the MAIN fuse blows because the large output wire to the alternator has been shorted to gnd by a screwdriver/wrench during maintanence.

 

Are you sure the main fuse blew out?...if the main fuse blows...shouldnt it "not" start?
As to your problem...I'd go with what HAILERS said

 

yes im sure the main fuse blew out...the car wouldnt start until i cahnged it which i already did...

im pretty sure its not the alternator cuz i havent messed with it yet but i willl check it thx...i'll keep posting...