My car will NOT stay running once in a while i can get it to run for about 3 seconds( My cadillac eldorado 89' 4.5l) i it blow the most massive load of smoke and covers the whoole car in smoke, then apon trying to refire big blasts of fire shoo up thru the throttle body.So much that it lit one of my injector harnesses on fire....*** i am so confused..... i had i running about 2 weeks ago and it ran fine i even went for a drive... i tried to ajust the choke idel thing and theres not alot of difference....when i actually do get it to fire over it sounds like tractor type thing with a puffy type noise.....it cranks like a bugger and fuel pours like mad inbto the tb.. i havent checked the plugs since it runs and it ran very well... any ideas?