needing advice

Hey guys i have a little problem here that hopefully you guys can shed some light on. a couple days ago after i got home from driving my 7g 1995 galant sports gt tt . i had to help a mate start his truck so being a good go i let him use my battery. Now this where it get interesting once he finished with my battery he decided to pyut it back in my can and then bang he put the terminals on the wrong way. So yea had to buy a new 100a main fuse. Install the main fuse, turn the key and yes the car started. but now is running rough as guts with crap acceleration cant even feel the twin turbos spooling plus on top of it the rev counter stopped working. Any ideas?

I bought my car with this problem years ago thats how i acquired it were someone jumpstarted wrong way round.
Finished up replacing the dash on mine. but just double check your havent any more fuses blown. i found a few others had gone but cant remember now which they were now.
But one was definitely for power to the dash.
Dave O

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