ok i finally changed my oil that was filled halfway with gas, and i changed out spark plugs. its the second day the atf has been in. and when i go to crank it over. it will try and catch. and will idle very roughly for about 10 to 20 sec. the gas in it is kinda old. i got decent compression. 100 in front 120 in back. 87 turbo 2 what can be causing this. to start back up and cut back off. usually when i hit the gas that makes it cutt off faster