I just had a glass pack put on my 84 944 yesterday and it was running great until today I got off the freeway and it started to cut out really bad, like there is hardly any power sometimes, I barely made it back home and i am really scared to drive it again, so any suggestions on what to check first?

 

nevermind on this, I think it might have been bad gas, or the idle, or that the coil wire was loose. it's running fine now and not cutting out anymore. thank god!