My Jimmy starts then stalls immediately. If I pump the gas, I can get it to stay on for a little bit then it stalls. Fuel is being pumped. I replaced the fuel filter which was very clogged, the starts are better and it doesn't stall as quick...but it does continue to stall. Not sure if the fuel pump is working but not delivering enough pressure, or the injectors are clogged or something. Thanks in advance for any help.