Hello and welcome to Just answer.com, Super mechanic here. Please DON’T hit accept until you are completely satisfied with the answer. If you have any further questions on it please just ask. About your vehicle.
You will want to check the fuel pressure to see if it is too low.
If ok, then you will want to see if the exhaust system is clogged. You can have an exhaust back pressure test done on it most muffler shops can do that with a back pressure tester.
REMARKS:  May be checked with either of the following methods.