Combines 2000 Model 9750STS poor power

how many hours on ur engineIJ make sure u have both new fuel filters, but i would guess ur injectors are probably shot. unless u have some ecu error code

1500 engine hours, no ECU codes, poor performance since day one.

i would probably replace the injectors, they arent that much in a tier 1 engine

The number one source of power problems I have seen have been in concave clearance I've had alot of low power complaints and after we get the machine opened up the costomer can't believe it's the same machine. And it really cleans up the sample.