I have an 97 863 Bobcat with the Deutz BF4M1011F 5 year ago i rebuilt the whole motor. Every since I've had it back together I have had start issues with it. It will start but surge until I put a ice pic in the injector rack. Then it'll power up and run fine. I have noticed that pressure in my air intake it is turbo'd and should be pulling a hard vacuum I'm now starting to think that my valve timing is off. Either an intake valve or exhaust valve is staying open during a compression stroke. It doesn't quite have the power that it used to before I overhauled it but everything in the motor is new. I had the head resurfaced and the valves checked and everything was good. Any other suggestions on why I'm developing pressure in the air intake box?
Check your valve clearance if you had a valve stuck open you normally here a chuffing noise every time the suspect cylinder fire .you could do a quick compression test that would be a good place to start.
Does that engine have a timing belt? If so it may have jumped
As already said above... Yea a compression test would probably be the best info you could get, I'd make sure the valve timing and clearance is right first before pulling injectors.