Ford transit t350 loss of acceleration

The code translates as:
P1300 = Boost Calibration Fault.
There is a leak somewhere in you turbo system. A loose pipe clamp, a cracked or split pipe or possibly a stuck blow off valve (dump valve). Get the whole system checked by a specialist. That should explain the loss of power.

You are low on transition fluid.

run fault codes and check for accelerator position sensor and or MAP/MAF/VAF sensors

check your breather for a restriction or the filter may be plugged

see the guides and proceed according, using common sense. God bless you

I would start with checking the plugs, wires, coil packs. If you haven't had a tune up in a while it will never hurt to replace these. Also check and clean throttle body. Check all around your intake manifold at each vacuum line for cracks and or leaks. May also be your catalytic converter. Does it run fine in park and neutral but have a loss of power in gear. Hope this helps

if turbo
turbo problem
run the fault codes

The actuator only opens when maximun set boost has been achieved. the actuator lets exhaust gas bypass the turbo once it has reached its pressure. check for vacuum leaks, cracks in the intake piping.

I had a similar issue to this after I got in a VERY small fender bender (literally) in an 87 Turbo Supra. In my case, my pasenger fender got pushed in JUST enough to crack a charge pipe and cause a boost leak.

Basically, what was happening was the turbo would spool and build boost, the mass fair flow sensor would read all this air coming in and tell the ECU to dial up the the appropriate amount of fuel. When the air reached the cracks in the charge pipe, it would escape out of them. Thus there was a much lower air-to-fuel ratio, causing less fuel to combust, which lead to power loss and black smoke out of the exhaust.

My guess is either an oxygen sensor, or more likely a boost leak.

Good luck mate.

yes it is most likely the turbo oil seal is leaking.